File Associations Hijack
I was wondering if it would be possible to get a portable app that hijacked the File Associations and rerouted them to a .reg or a .ini file temporarily. So that when I put in my drive and run the program I can have my custom list of file associations become dominant... (ie html files open in portable firefox, video files open in portable VLC etc.) Then everything goes back to normal when I close the program and remove the drive.