Now here is a randome question:

I need to find all SQL Server Enterprise Edition servers on the network. Unfortunately, it appears that SMS can only check for the (non-)existence or properties of a file. It can even look for registry key values. What it apparently can not do is log into SQL Server. This eliminates @@server and serverproperty('Edition'). Anyone know of a handy-dandy way of differentiating editions of SQL Server by just looking at the filesystem or registry? Remember, SQL Server is unavailable to you.

Oh, and "Ask the DBA" was apparently rejected as an answer. Darned Microsoft licensing lawyers...