Just go to Preferences > Menu and either pick the pre-created, 
editable copy of the default profile or create a new one. You can 
drag and drop the Movies folder at the top level there then, if you 
so want.

I've added the TinkerTool issue to the ToDo list and will investigate 
it later. Basically, as a developer, you provide a subclass of NSCell 
to the NSTableView - and just keep using the font that is already set 
up - which works fine and should be compatible with future versions 
of OS X. So I'm a bit afraid to break compatibility with Leopard in 
favor of an unsupported feature TinkerTool makes use of. But I'll 
have to see about that.

Best regards, 
Felix