[?] Disabling version check for coop play?

[3===SPECTER===3]

I finally just got the two versions of BF2 to run side by side,v1.41 and v1.5. And the only reason I did this was so I could play PR singleplayer and have the ability to call in artillery and what not. But since its version 1.41 it comes up saying that I need v1.5 to play PR. I can't exit out of this warning so I need to know how I disable it from coming up. Any help would be appreciated. And FYI my PRSP is just the normal PR copied with more SP maps and some new weapons and such. So there nothing different from PR v.91 that should affect my problem. Any help is appreciated.