USF/MiniUSF is playable on Windows XP using Winamp with the "64th Note" plugin (www.halleyscometsoftware.com
). If you're using another platform, you're currently out of luck. 64th Note is based heavily on the "Project 64" emulator, and Project 64 is coded in a style that is, to put it mildly, hostile to portability. I could teach an entire semester on how not to write C/C++ code just with that source. (No insult to the coders is intended - they appear to be far too young to have practical experience with multiple platforms, much less proper CS training at a university level).
In other words, portable USF playing will require first writing an entire new N64 emulator. I'll probably take a swing at it eventually if nobody else does but it's not a high priority at the moment.