Looking good
And I fully agree with graham, it may be lots of work but that's what sets XY apart from the rest.
Although, not that I want to give you more work or anything

, but looking at my (use of) XY very quickly, one feature I would put some highlight on as well, is the Tree's highlighting features : Boxed Branch & Highlight Folder
They may be overlooked cause seem only to be secondary, visual "toys", or just because they can't be found elsewhere, but I know that - AFAIC - I couldn't live without them !
So many times I don't bother looking for the current path I'm in, because I don't even have have to look at the Tree, my eyes can see the background color (boxed branch) and that's all I need to know where I am !
Add to that the highlight folder, which I also use with color codes as a state indicator for some projects, and it really is very helpful!
That may be me, but I'd say those two features are killer, too!
j_c_hallgren wrote:Because....one could say "Begin the tour" which is very similar to "Start the tour"
Exactly, which is why it's bad IMO, because it may not have any Flash implications to you, but both terms have been used to begin/start/play some kind of presentation, Flash or other.
So I would say that Index is probably a better/commonly used term...