I know of a few LoTR mods for NWN, but they all require a hefty Hak pak (no problem for broadband though). Obviously, try Neverwinter Vault (
http://nwvault.ign.com) to search for it.
The best NWN LoTR mod is LoTR : Sons of the Steward (or something similar).
I've never heard of the one you're talking about and a search on nwvault dosen't show any results.