Where are my CRE files?

Hi all,

I'm playing BG:EE through Steam but I can't seem to find my CRE files, Override folder or the 00776(sp?) folder. I first read about these files due to SK and then I found I just needed my Chitin.key file so I found that was in my BG:EE root and didn't investigate anymore at the time.

Now I'm unable to find the above files, but I'd like to see what is available for CLUA spawning, etc!