Mr Oronomus that is one damn fine procedure.
I've used it a couple of times because every time I add music to my library it never shows up in musiclobby. I see in the log that it adds new music on its own, but they never show up in the musiclobby browser. I manually rescan the library, restart the server, even reboot my server PC but they never show up. I have to blow it all away and rescan just as you described. Oh, and don't forget to restart the ML sever at the end or you can get really weird results
Live long and prosper.