Thanks.. this actually has the functions I'm looking for.

LsaEnumerateTrustedDomains($server, \@domains)

Enumerates all trusted domains. If you execute this on a workstation o
+r a member server, you'll get your domain and the domain sid. If you 
+execute this on a PDC or BDC, you'll get a list of all trusted domain
+s and their sid's.
[download]

Anyone know why this module isn't on CPAN?

Thanks again..
Rich