Environment Manager

Environment Manager is the developers and IT persons friend.  It allows you to view, edit and validate the enviroment variables on a Windows XP or Vista machine.

Environment Manager is offered as a free download...

Features 

View System and User Environments
Edit an Environment Variable 
Reorder Folders in an Environment Variable 
Validate Folders in an Environment Variable
Add or Remove any Environment Variable.
Find any executable in the PATH via whereis functionality.
Runs on Windows XP and Vista