For W9X/NT/W2K systems I would advise Lavalys's (Everest) first one: Aida32
http://www.softpedia.com/get/System/...nfo/AIDA.shtml
Whilst dev is stopped now, it's fully functional and a complete sys snooper soft for use with older hardware.
No install needed, runs from USB if you want.
My 2 cents ......