You're looking for the Environment variables, which are buried in some 3rd-level window in the Control Panel, under System somewhere (depending on your Win32 version).
Your best bet would be to use PPM.
- In general, if you think something isn't in Perl, try it out, because it usually is. :-)
- "What is the sound of Perl? Is it not the sound of a wall that people have stopped banging their heads against?"