Question : Problem: Can I run an SMS Report for a certain thing in the Registry?

I was wondering if I would be able to run a Report in SMS to check the Ghost version of PC's using their Registry entry?

Answer : Problem: Can I run an SMS Report for a certain thing in the Registry?

Two ways to handle this...
 if you need this on a regular basis, consider extending SMS inventory with
the SMS_DEF.MOF file.
 if this is more "ad hoc", you could write a utility (vbscript, sms
installer, etc) to query for the value, then write out a local file that sms
could inventory. Deploy the utility with sms to all clients...