Well, I would like to apologize to you Ilari, I thought I had come up with a way to be able to tas PS2 games, however arduous it might have been.
The problem I ran into, was that even in the most stable state I could make the game, external input recording software was not able to be effective as little changes in the EE (Emotion Engine) would change every run through. Thus making any set inputs differ ever so slightly than the intended result, which would add up very quickly.
So on the off chance that PCSX2 ever does add TAS support, I'll be waiting. Otherwise, thanks for trying to help.
I guess that its safe to rule out external recording for tas'ing ps2 games. If needed I could cite the macro tools I tried, and how quickly the discrepancies appeared.
Oh ps, I was working on TAS'ing We Love Katamari, which would have worked perfectly with a macros, since the entire game is essentially a whole bunch of IL's. To bad the desyncing from the EE was screwing it up.