Cory, I'm with you!
Clearing out all the dross that gets stored up in temporary files of one kind or another is by far the most efficient way to improve the speed of any Pc more than about a year old!
I've been using this for ages,

cd /d "%userprofile%\local settings\temp\"
rd /s /q .

saved as a batch file in the all users' startup folder, but I think I'll upgrade to yours now!

Cheers!

Jim