Integration 2: The style

Hi, a quick follow up to my other post about integration, only this one convers something else, so I'm starting a new thread for it.

As part of making this forum work with my site, I want to edit it so that it fits in with the design... the first bit of this will be changing the colours, which should be fairly easy using the SpinkBB site..

The second bit would be to remove the margins, and give it a fixed width of 768 (which will either be aligned center or to the left), and then add the title image and some basic html to the top of the page and bottom of the page.

How easy/hard would this be to do? Can someone give me some pointers please?

Thank you.