Background Images:
First thing you need to do is go here:
http://www.brownpride.us/forum/album.php?u=13727
Then what you need to do is make an album there, and upload the picture of the mexican flag. To do this, you need to save the pic to your computer, then you choose: Upload Pictures
Then you choose "browse", find the picture, and choose upload.
You do not have to fill up all three slots
You may add a description if you like, but its not nessicary. All that you need to do is click "Save Changes"
Next you click on the image you just uploaded.
The next step is copying the link that it gives you, this will look like:
http://www.brownpride.us/forum/picture.php?albumid=blahblahblah
Copy the link you get, you will need it:
Its under: Picture URL
Now is the adding part.
Next you go to: Customize Profile in your userCp
The first set of things to edit, you will see Background Image, paste the link in there, scroll down, and save your profile settings.