The point of my post are to clarify the many wrong statemants by many posters in this thread. Instead point out facts. It was time to do this, since noone had done it previously.
Indexing and Libraries works exactly like intended by Microsoft. There is no mystery behind this.
All that I have written is 100% correct, and you don't need any 3-party tools (like any Zorn software), nor any registry hack or anything, to add networked shares to (Windows 7) Explorer Libraries. All you need to do, is make sure the shares are indexed in the server end - by using Indexing in Control Panel. If you run Windows Server 2008 R2 (as the server of shares), note the indexing is not installed by default, so you need to install it in Server Manager.
And, once again, on Windows 7 64 Bit, these folders in the library (however you added them) will not be indexed.
I have a feeling you don't understand this. If you try to add shares into a library, of course they won't be indexed just because of that. You cannot in the client index an unindexed share of the server, but you CAN in the server end, i.e. you must do the indexing in the SERVER end. If you still have trouble getting it to work, make sure you have the correct file security (for the user) set in the server end. People miss often on this point.
But be my guest and install Zorn & Co, if you want to be complicated. I, on the other hand, has learned during my soon 40 years in the business as everything from programmer to systems admin, that the less "extra" toosl you use, the better and more stable your systems run. If there is a built-in solution you should use it. Always.