I used to love this mod but due to performance issues it was hard to keep it stable. It expands the town of Arefu significantly and includes a bunch of quests as well as a nice player house in Arefu.
Fallout 3 seems more stable using the FNV engine so would be fun to try. Here is a link to the original mod:
I have not tried to contact the author about any attempt to update for TTW. For anyone wanting to check it out using the Fallout 3 engine I recommend turning off increased spawns for MMM and/or significantly reducing settings for viewing distance for things like grass, trees, etc when close to Arefu.