Get an updated SoF2MP.exe from here that just works: http://1fxmod.org/clpatch/
If you don't trust our executables, you can find the details below on how to patch it. You need the "GL_EXTENSIONS patch".
@shift maybe an idea to push the patched executable with FP?
this doesnt allow custom pk3s in demo as far as I tried.
also to get fairplay running and everything I had to set all of my exes to run in compatibility mode for win xp SP3 (win7 didnt even run properly, YMMV) including fairplay.exe itself
I didn't need to rename my exe to mohaa tho, but the exe definitely had to be named sof2mp.exe to be able to run. any_other_name.exe and it was a no go.