Help with header, & rounded corners

[CinisterDP]

I know how to have the header span the entire length of the forum, but I do not want the background to do the same. Also, how would I go about inserting rounded corners, and moving the vBulletin license info up so that it is not on the bg, but on the white as shown in this picture?

TIA

Edit (SaintDog): Removed image and added as an attachment.