You can find most everythign starting at shellfront:

http://www.shellfront.org/

LS in is kind of a state of flux, and because they are converting to a theme standard, a lot of older themes won't work without tweaking. Best thing to do is roll a simple one yourself, getting a feel for the theme standard, and then you'll be set to make any theme you choose cozy on your system.

If you have any futhur trouble, just ask away.

LSDev

http://www.shellfront.org/lsdev/

just remember when you say 'latest' you aren't necessarily choosing the most stable build, ...beyond here, there be dragons

Ugh, i'd be afraid to say. If Jafo wanders through I'm sure he could tell you exactly which one works best for him, i'm on a Talisman skinning break from LS. I'd be tempted to tell you Oct. 1999, lol. If you poke around here and at deskmod and deviantart, many of the themes will mention what build they used inthe comments. Get a good sample and see what the average is.

I *think* there are some pre-made litestep boot screens at deviantart, too. You been to Floach?

http://floach.pimpin.info/

I bet there are some graphics floating around there or on a linked page. There's always Google image search