I realize that PC-BSD exists, but sometimes, you need only FreeBSD without PBIs and you want it to do it all yourself because that is why you came to FreeBSD in the first place; to be an expert user and be able to set everything up yourself.

Edit: I have now made a patch zip file for Vista SP1 32bit available here: http://www.unet.fi/fransblog/wp-content/uploads/2008/03/termsrv_sp1.zip (hope it works for you, it did ok for my Home Premium SP1. However, note that I am not the original author of this hack, and can not offer any detailed technical help if something goes wrong; use only on your own responsibility, etc. Note that this does NOT work for the 64bit Vista.) — Note: commenting currently disabled (the thread is getting too long…)