Just installed it, worked fine
Not much change in database size though, from 1.8MB to 1.74MB
oh well.
I don't know if its possible, but how about a feature where it will automatically close your forum with the message "Forum temporally closed for Repair & Optimizing Database". It will then send you a backup of the database (just in-case), and after you get it, it will start to optimize. After its all done, it will open the forum again automatically.
On a side note, I thought it was OK to distribute original vBulletin code, if you get permission from the people who made it. Just like in that updated vB code JS thingy.