You've got to check out the third edition of this scripting column!  Not only does he provide lots of useful information for script writers, but he has some clothing fashion sense in him too (check out the jpeg).

In the latest installment, the GUI Guy explores the mysteries of Wbemtest.exe, explaining how that cryptic and little-known tool works, and showing how you can mimic many of the functions of Wbemtest using scripts.  Take a quick look at: http://www.microsoft.com/technet/scriptcenter/resources/guiguy/default.mspx.

Wbemtest.exe <==> Windows Management Instrumentation Tester