I'm running an 80GB SSD drive in my desktop. Do you happen to have a second standard hard drive that you could use....for things like the page file and so forth.
Here is a link to a thread that I started on the WinSXS system. Don't worry, it isn't really using all the space "it seems" to be using:
WinSXS Folder not actually consuming lots of space
If you aren't going to use hibernation, you want to disable the hibernate feature to remove the hiberfil.sys file. (powercfg -h off).
On my 80GB drive (with 74 usable), I've got over 50GB free with all of my apps loaded,Win 7 Ultimate, Wolfenstein and Crysis installed. I've got a second 1TB Western Digital Caviar black that I use for file storage, page files, and my browser caches.