Shoutbox

Hi. I'm having some problems with skinning, could anyone help me, please?

• Does anybody know how to tile the background, rather than have it stretched across Messenger?
  
• I've replaced the scrollbar, but when I have a lot of messages in my conversation, it gets smaller and smaller as usual, but then gets to a pathetically small size of about 3px. Is there any way I can stop it shrinking to 3px?

Thanks a lot for your help, in advance.