I'd have to look it up for the name of it on my notebook, but my Firefox skin is based on classic Netscape. I went through page after page looking for the cleanest and best, instead of settling as I have before. I decided that was it. I wasn't looking specifically for Netscape. It was buried in about the middle of all the options (page 230 or something). There were 2 or 3 Netscape based themes like this.
As noted, IE 9 was a major improvement and update. Not sure how it would work on Windows XP (even if it does, though I assume so). But I didn't install it on my netbook (XP) figuring the design was too new and the computer too slow. As noted, it is still not the best interface, but is definitely a major upgrade.