Centering Gallery 1.5.7... Removing borders...

The following information is required to get an answer:
Gallery URL (optional but very useful): www.boxdonkadonk.com/gallery_
Gallery version: gallery 1.5.7
Operating system: Linux
Web browser/version (if applicable): Opera 924

Hello all....

I'm new to gallery and I've "customized" it to the best of my ability but I'm having a difficult time centering my gallery. Basically I want the the entire Gallery to be a width of 760pixels and centered but I don't know what I need to edit(files) and what lines.

Also if you look at my gallery @ boxdonkadonk.com/gallery_
I was trying to figure out how to remove the border around the "Album Description". If you view my gallery you can see exactly what I'm talking about because it looks out of place.

Any help is appreciated
thanks