diff --git a/schema/v1/ScriptRunnerSchema.json b/schema/v1/ScriptRunnerSchema.json
index 5c3a517..14d3196 100644
--- a/schema/v1/ScriptRunnerSchema.json
+++ b/schema/v1/ScriptRunnerSchema.json
@@ -80,7 +80,8 @@
                                         "directoryPicker",
                                         "datePicker",
                                         "numeric",
-                                        "timePicker"
+                                        "timePicker",
+                                        "fileContent"
                                     ]
                                 }
                             },
@@ -208,6 +209,22 @@
                                     },
                                     "required": ["prompt"]
                                 },
+                                {
+                                    "properties": {
+                                        "prompt": {
+                                            "const": "fileContent"
+                                        },
+                                        "promptSettings": {
+                                            "type": "object",
+                                            "properties": {
+                                                "extension": {
+                                                    "type": "string"
+                                                }
+                                            }
+                                        }
+                                    },
+                                    "required": ["prompt"]
+                                },
                                 {
                                     "properties": {
                                         "prompt": {
diff --git a/src/ScriptRunner/ScriptRunner.GUI/ParamsPanelFactory.cs b/src/ScriptRunner/ScriptRunner.GUI/ParamsPanelFactory.cs
index 8cf82ca..a210de0 100644
--- a/src/ScriptRunner/ScriptRunner.GUI/ParamsPanelFactory.cs
+++ b/src/ScriptRunner/ScriptRunner.GUI/ParamsPanelFactory.cs
@@ -1,5 +1,7 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
+using System.Text;
 using Avalonia.Collections;
 using Avalonia.Controls;
 using Avalonia.Media;
@@ -146,6 +148,17 @@ private static IControlRecord CreateControlRecord(ScriptParam p, string? value)
                         Text = value
                     }
                 };
+            case PromptType.FileContent:
+                return new FileContent(p.GetPromptSettings("extension", out var extension)?extension:"dat")
+                {
+                    Control = new TextBox
+                    {
+                        TextWrapping = TextWrapping.Wrap,
+                        AcceptsReturn = true,
+                        Height = 100,
+                        Text = File.Exists(value)? File.ReadAllText(value): string.Empty
+                    }
+                };
             case PromptType.FilePicker:
                 return new FilePickerControl
                 {
@@ -270,6 +283,26 @@ public string GetFormattedValue()
     public string Name { get; set; }
     public bool MaskingRequired { get; set; }
 }
+public class FileContent : IControlRecord
+{
+    public IControl Control { get; set; }
+    public string FileName { get; set; }
+
+    public FileContent(string extension)
+    {
+        FileName = Path.GetTempFileName() + "." + extension;
+    }
+
+    public string GetFormattedValue()
+    {
+        var fileContent = ((TextBox)Control).Text;
+        File.WriteAllText(FileName, fileContent, Encoding.UTF8);
+        return FileName;
+    }
+
+    public string Name { get; set; }
+    public bool MaskingRequired { get; set; }
+}
 
 public class MultiSelectControl : IControlRecord
 {
diff --git a/src/ScriptRunner/ScriptRunner.GUI/ScriptConfigs/PromptType.cs b/src/ScriptRunner/ScriptRunner.GUI/ScriptConfigs/PromptType.cs
index 14a57c8..0b98a6a 100644
--- a/src/ScriptRunner/ScriptRunner.GUI/ScriptConfigs/PromptType.cs
+++ b/src/ScriptRunner/ScriptRunner.GUI/ScriptConfigs/PromptType.cs
@@ -12,5 +12,6 @@ public enum PromptType
     FilePicker,
     DirectoryPicker,
     Numeric,
-    TimePicker
+    TimePicker,
+    FileContent
 }
\ No newline at end of file
diff --git a/src/ScriptRunner/ScriptRunner.GUI/ScriptReader/PromptTypeJsonConverter.cs b/src/ScriptRunner/ScriptRunner.GUI/ScriptReader/PromptTypeJsonConverter.cs
index 52c00d1..bfa09b8 100644
--- a/src/ScriptRunner/ScriptRunner.GUI/ScriptReader/PromptTypeJsonConverter.cs
+++ b/src/ScriptRunner/ScriptRunner.GUI/ScriptReader/PromptTypeJsonConverter.cs
@@ -22,6 +22,7 @@ public override PromptType Read(ref Utf8JsonReader reader, Type typeToConvert, J
             "directorypicker" => PromptType.DirectoryPicker,
             "numeric" => PromptType.Numeric,
             "timepicker" => PromptType.TimePicker,
+            "filecontent" => PromptType.FileContent,
             _ => PromptType.Text
         };
     }
diff --git a/src/ScriptRunner/ScriptRunner.GUI/ScriptReader/ScriptConfigReader.cs b/src/ScriptRunner/ScriptRunner.GUI/ScriptReader/ScriptConfigReader.cs
index 533eba8..f8d9127 100644
--- a/src/ScriptRunner/ScriptRunner.GUI/ScriptReader/ScriptConfigReader.cs
+++ b/src/ScriptRunner/ScriptRunner.GUI/ScriptReader/ScriptConfigReader.cs
@@ -50,6 +50,7 @@ private static IEnumerable<ScriptConfig> LoadFileSource(string fileName)
             var scriptConfig = JsonSerializer.Deserialize<ActionsConfig>(jsonString, new JsonSerializerOptions
             {
                 PropertyNameCaseInsensitive = true,
+                AllowTrailingCommas = true,
                 Converters = {new PromptTypeJsonConverter(), new ParamTypeJsonConverter()}
             })!;
 
@@ -57,10 +58,22 @@ private static IEnumerable<ScriptConfig> LoadFileSource(string fileName)
             foreach (var action in scriptConfig.Actions)
             {
                 action.Source = fileName;
+
+                if (string.IsNullOrWhiteSpace(action.WorkingDirectory))
+                {
+                    action.WorkingDirectory = Path.GetDirectoryName(fileName);
+                }
+
+                if (string.IsNullOrWhiteSpace(action.InstallCommandWorkingDirectory))
+                {
+                    action.InstallCommandWorkingDirectory = Path.GetDirectoryName(fileName);
+                }
+
                 var defaultSet = new ArgumentSet()
                 {
                     Description = "<default>"
                 };
+
                 foreach (var param in action.Params)
                 {
                     defaultSet.Arguments[param.Name] = param.Default;
@@ -78,14 +91,22 @@ private static IEnumerable<ScriptConfig> LoadFileSource(string fileName)
                 }
 
                 action.PredefinedArgumentSets.Insert(0, defaultSet);
-                if (string.IsNullOrWhiteSpace(action.WorkingDirectory))
-                {
-                    action.WorkingDirectory = Path.GetDirectoryName(fileName);
-                }
 
-                if (string.IsNullOrWhiteSpace(action.InstallCommandWorkingDirectory))
+                foreach (var param in action.Params.Where(x=>x.Prompt == PromptType.FileContent))
                 {
-                    action.InstallCommandWorkingDirectory = Path.GetDirectoryName(fileName);
+                    foreach (var set in action.PredefinedArgumentSets)
+                    {
+                        if (set.Arguments.TryGetValue(param.Name, out var defaultValue))
+                        {
+                            if (string.IsNullOrWhiteSpace(defaultValue) == false)
+                            {
+                                if (Path.IsPathRooted(defaultValue) == false)
+                                {
+                                    set.Arguments[param.Name] = Path.Combine(Path.GetDirectoryName(fileName)!, defaultValue);
+                                }
+                            }
+                        }
+                    }
                 }
             }