Update: just found this out, every new server you join, it resets your motionblur and turns it back on. Thats why it doesnt seem to be working in multiplayer, thats why u cant seem to turn off motionblur even with the config files. I bet all the good hackers know this but they dont wanna tell nobody. Well suck it, cuz im tellin the hwole world this shit! So basically u have to disable motionblur for every server u join. Now I will admit they prolly had a good reason not to tell ppl this secret, and due to the hackers out here, I wont be tellin yall how to do it. Im only gonna say it doesnt involve any hex editing or patching of any kind.
Big hint: it involves a feature that's in the legit exe that is lacking in ALL the cracked exes. Those fascist bastards! But i managed to sort of turn it on..... sometimes. Like everytime a map loads. So its useful enuf.