KACE Product Support

To the best of my knowledge Microsoft doesn't actually differentiate those other than licensing; meaning that the installations look similar (if not Identical) on installation. The express editions look different and KBOX easily detects them differently. That being said, if there's a difference in the registry or file stucture between Standard, Enterprise, and any other flavors, you could certainly create a custom inventory rule. In the infamous words of my favorite Star Trek quote "the thing's gotta have a tailpipe"- translated- we can figure it out. :)

It looks like you can do this by using a batch file to call a SQL statement to get the version:

http://www.dostips.com/DtCodeBatchFiles.php#Interfacing.Sql2
http://www.aspfaq.com/sql2005/show.asp?id=20
http://blog.flimatech.com/?p=1302

But like cblake said, if you find a registry entry or file that is different, a custom inventory rule would be simpler.