Well, it starts off with your Impulse games, but that's it. It doesn't put all the non-Impulse games on it automatically.
Uh, it does. It found Total War from Steam and CoD4 (CD install) and some others ...
Hm, thinking about it, RTP found all games i had a shortcut for under My Games in Impulse. I have a Tab called OL Games in Impulse; Games in there were not found by RTP. So it seems you are reading the My Games tab in Impulse and not the registrated games, yes?
OK, it makes sense now, thanks.
Maybe, when RTP is first run, ask which tab to include in the setup?