[ZomgStuff]

If you change those properties, the rest of the page will shrink proportionally so you'll have to edit your "page" class in your template to be 100% instead of the default 90%, then change your navbar width manually to 96%, then you'll have to somehow change your navbar to 90% and get it centered , and then set your .body CSS margin to "0px 25px".

It's a bit tricky, and whoever designed that skin didn't do a very good job.

edit: You can probably ignore this post as maybe I am trying to do something else with that skin other than what you are trying to do.