Is any one using the Software Licensing function of SD Plus?

I tried using it a while back unsuccessfully.

It started with the Purchasing module and found that I could not add the application unless they had been already installed and  scanned (not possible for new software) .  This forced me to create a custom category so I can create purchase order, but it breaks the link between Purchasing and Software inventory.

Are there ant best practice documents that explain how to set it up?

I also use Desktop Central, any comments if its license tracking function is any better?

Thanks

Sal