How about a press-and-hold to go all the way to the top menu, and 
just a press to go up une filesystem level?

Sometimes I feel like the remotebuddy menu itself being 
customisable. That makes perfect sense when you have 54 buttons on 
your remote (ps3), I could do both things (discussed above) with 
different buttons. But I know there must be much more important 
things in your ToDo now, so don't worry about that.