Search these forums. There are a number of links to sites with comprehensive lists of serices and their functions to help you determine what to disable.
I have been following this site, this section of the forums specifically, and it has been a great help in constructing my poor man's carputer. Thank you.
Now, I have a question: basically, what specific files in system32 not to delete to have a few programs work...
Wireless Zero Configuration
Winamp w/ DirectSound Output
For the uninitiated, Autohotkey is an excellent hotkey/scripting program. I have it boot as my shell, then it automatically runs Winamp and LCDSmartie... and it maps all my USB numberpad buttons to do neat things. I even have super secret key combinations that do nifty stuff like disable EWF and enable wireless networking. Highly recommended.
So, those are the only things I need. Everything else can go. Any knowledge would be greatly appreciated.
Also, how do I figure out what specific files that a device's driver uses (i.e. sound card)?