Ugh.

I've scoured the memories, but, as usual, I'm either blind or stupid. I'm sure it's in there somewhere, but I can't find it. My question is this: In Photoshop 7, how does one convert an image to RGB colour mode? I've saved some .gif images, but instead of having a "background" they have an "index" and I can't really do anything but crop. Help? :X