By the way in regards to SSD's Windows 7 has an awesome new feature that you can create sym links like in Unix. So what I have done is installed everything on the SSD (I have 2x120gb in Raid 0) and I have a 7200rpm 1TB disk as well, then use this http://www.lifehacker.com.au/2010/02/mo ... windows-7/
What happens is you move the users directory to your normal disc, then create a sym link on the c:\Users to d:\Users.
All the setting like internet cache and tmp files for your user will get written to your d:\ so your SSD performance doesn't degrade too much.
Also what I do is, I install all games on my SSD and when I'm not playing them as much I have a d:\program files (x86)\whatevergame symlinked to my c drive.
As far as the operating system and every other app they all think it's on the C:\
Hope it makes sense.