Microsoft finally updated Tweak UI for Windows Me and 2000. Best feature: It lets your customize the places bar in the file dialogs. I'm so glad I don't have to hack around in the registry to figure out how to do it manually.
Addendum: I took a look at it, and it's not really a custom places bar; You can't put your own folder entries into the bar. I'll poke around the registry later to figure it out, then post it here.