djTequila

not sure how exs handles the REX2 files. I only just recently have started using it and have not explored much past the initial loading and tweaking stages.

I know that the exs will play rex files in their intirety, and it also has a wave editor that allows you to select only certain portions of the loop or rex file. Of course this is probably just the surface of the exs.

Check osxaudio.com. That's a good place to learn more about Logic and other logic related software. Also look at emagic's web site.

sorry i'm not more help.