GarageBand (iLife '08) user-created loop location?

Hey,

I've searched high and low, and while I've located the Apple installed loops, I cannot for the life of me find the ones I created.

Basically what I've been doing is using my Line 6 TonePort UX2 to create riff loops.....just a bunch of cool little ideas, to be mixed together later. GB is a fantastic tool for this!! But I realized I put the wrong song data in there, i.e. key and tempo, and want to either:

A. Delete them and re-create them with the right info, or
B. Modify the loop metadata for the existing loops (preferred, of course)

Can someone point me in the right direction for these items?

Thanks in advance!!!