The Portable Freeware Collection Forums

Just this website. Haven't found an application that does what you described.

Driver Collector is a tool designed to find and collect installed windows drivers for the hardware you select on your PC. Once you tell it which type of drivers you want to collect, it will copy them to a specific folder. This can be very handy when preparing for a format and reinstall of Windows, e...

CCleaner is awesome, but it isnt portable. This version is. I found this over at the CCleaner forums.

http://forum.ccleaner.com/index.php?showtopic=5707

It saves settings to an ini file and all that.
Direct download Here