This is the best publicly available documentation for HijackThis:
http://www.bleepingcomputer.com/tutorials/tutorial42.html
http://www.spywareinfo.com/~merijn/htlogtutorial.php
All GMER documentation can be found at http://www.gmer.net
http://www.bleepingcomputer.com/tutorials/tutorial42.html
http://www.spywareinfo.com/~merijn/htlogtutorial.php
All GMER documentation can be found at http://www.gmer.net