How can I boot a game off a memory stick?

[geowal19]

I have an old Halo game on a memory stick that dosen't need to be installed on the machine your using. How is this done? I would like to do it with MTA:SA if it's possible the size dosen't really matter as I have a 16GB memory stick. Can someone link me to a tutorial or something! Thanks

 

[geowal19]

Fair enough but it's not for constant use on my main PC just the occasional session on my work PC.