So - this won't be (at present) really doable with the report-engine - the SLM reports are hard-coded (presently), as there's a lot of SQL that needs to be run behind the scenes.
You can try using the "Products Used in the Last N Days" as a beginning.
Otherwise, if that report doesn't provide what you want, you'll need to go and get the data via SQL (where I hope that either you yourself are SQL-savvy, or have a SQL-resource available). Some threads for you to look at for this to be potentially useful would be:
A fair few similar threads are available - so doing some searches (especially to help with the SQL) can be found here (both in the SLM and the REPORTING sections).
LANDesk EMEA Technical Lead