Website design and HTML question

[Lowone]

I have been working on my site for a bit now. I was just looking for some opinions on the design. Any feedback will be very much appreciated. Thanx
www.undergroundsignworx.com
I also have a question about html editing.
Does anyone know if you can add an html text box into xtreme? I have some affiliation banners I need to add and I know exactly where I want to put them. I am trying to put a text box with the code to the banner in it so it will appear correctly. I need the link to track from my site. Thanks in advance.

J