look i know you guys don't give out video gaming hints and/or secrets or anything but i'm stuck in Chapter 4 WRO whatever?
i did the first part ok but the finding of the keycards is what i'm having trouble with can you guys..................?

You're best off looking in GameFAQs.com or something. The best advice I can give is to do a sweep of the map and kill every enemy.

I'd second the gamefaqs suggestion; either that or keep at it, you'll crack it in the end.