The following is a good source for auditing a computers. It dumps a file to a directory and lists computer information and software installed using VBScript.

http://bassplayerdoc.blogspot.com/2007/10/using-wmi-and-vbscript-to-audit-your.html

 

This script lets you search a list of computers for software. It will generate a XLS file with the results.

http://bassplayerdoc.blogspot.com/2007/12/check-if-application-is-installed-on.html