This is a great Windows utility compilation that I put together for my repair business. It was designed for the ultimate "on the go" computer technician with all the apps you'll ever need to fix virtually any PC problem.
It includes a USB key imaging program that makes the setup a literal no brainer. (Make sure to run as it as Admin in Vista and Windows 7)

Multiple portable Windows apps and multiple bootable options.

The following is from the included "read me"

Run-time portable apps:

CCleaner Portable
Eusing Portable Registry Cleaner
Malwarebytes Portable
SUPERAntispyware Portable
Altiris RAPID-DEPLOY and Image Explorer
System Info Wizard
UBCD4Win Wintools
Hiren's Bootdisk 15 Wintools
I/O Bit Smart Defrag
Portable Ultra ISO
USB Imaging Tool
Removers for AVG, McAfee, and Norton
Portable TeamViewer
End It All
FireFox Portable