A couple of shell scripts I use to reset my laptop's wireless mac address to the same as my Roku Stick so I can use it in hotels
You set the ROKUMAC environment variable by typing in what you find on the sticker for the Roku Stick
You set the ADAPTER environment variable by observing the output of iwconfig
This ought to work via sudo or root access on any system using NetworkManager. It also requires the macchanger command to be installed