Your the guy that bought FPSC X10 just for the models even though your pc cant run the software LMAO im sorry but that made me lol so bad. That was so dumb, now they wont even work for you im sorry but that is the most stupid thing someone has done for ages.
And this is how to fix it..
Do the following:-
Main Script: people\strafe10.fpi
Shoot Script: people\shoot.fpi
Destroy Script: destroy\leavecorpse.fpi
That will do it if not then you cant fix it thats what i did with mine and it works for me.
Also DarkAI.fpi is not the way to fix this it is the exact same code as strafe scripts and does nothing different until lee adds DarkAI code into the source in later versions.
Good Luck