Thanks Commander. I've tried those a million times. I hit the start button for pause (within any single player venue), then go about doing the up, down, left, and rights..etc. There's even a version where you need to hold L2/R2 while using the D-PAD for codes. However, none of these work, at all. I was just wondering if anyone else was experiencing the same difficutly.
One thing I might be doing wrong is, I have pre-loaded the codes on Action Replay - that could be my difficulty. I may have to start completely over with a different mem card.
Thanks for the response Commander. Your sig is cool too, btw. I can't get mine to load properly.