Here are a couple of ways to edit your myspace layout. I will use my account to show this. By the way...since I am showing you my myspace...and it is "private"...you should deffinately add me.
Step 1: Find a layout
Go to Google and find a layout that you like. Be sure that you don't enter your password ANYWHERE other than Myspace..there are a lot of scams out there.
When you find one that looks good...go to the next step!
Step 2: Sign in and go to the edit screen
Just like the title says... go to myspace, sign in and then click on "edit profile"
Step 3: Copy and paste
From the site that has the layout copy the code, it should be supplied somewhere near the bottom of the page.
Paste it into one of the various sections on your "edit profile" page it will work in any of them except for the "Headline:" section.
Step 4: SAVE and VIEW
Just click save and your background should be changed. I hope this instructable was simple yet instructive enough to be helpful.
If you have the time add me here