Those two threads should help you along.
But - in short - find the registry key you're looking for, add it to the LDAPPL3.TEMPLATE, then hit the "make available to clients" button (its location depends on which version of LANDesk you're suing), and ensure that your clients will send an inventory "as the logged in user".
User context will be a big thing here.
Alternatively, have some VB-script copy the reg-key from HKCU to HKLM for instance, that way it's more reliably readable .
- Paul Hoffmann
LANDesk EMEA Technical Lead