PrefsMenu progress update

Despite all the fuss with moving house, I'm managing to get somewhere with PrefsMenu 2.0. It's shaping up to be a really nice update, though I'm going to have to scale back a few of the features to get it released asap (the current version of PrefsMenu doesn't work properly under Tiger). I've still got a few things left to implement, but I'm going to shift as many of them as I can to v2.1, so hopefully I'll be able to release an update soon.