NI has changed a few things with cursors... it seems that unfortunately there is not an easy way to reference the cursor legend itself. I have researched this fairly thoroughly, and there has in fact been a corrective action request (3NEF7G00) filed for this behavior. This request does not list a date for a fix, and it seems that this decision was made by R&D. As you have noticed, there is a way to reference and change properties for individual cursors. This is fairly easy to do by creating a property node-->Cursor. This seems to be decision with R&D, and I have not found a good workaround for this. I am sorry that this is the answer I have to give, but that is where we stand. If you do find a good workaround for it, please post it here, I'd be interested to find out myself.
If it is indeed impossible to create a reference to the cursor legend tree, then how was I able to do what I did in the attached VI?
(Expand one or both of the cursor trees in the legend and then run the VI.) See the block diagram.
Note that I don't remember how I did it either (which is why I posted this originally). I had notes on this in an email exchange with Norm Kirchner but I think during our change of email clients, it got deleted.
I have been trying to reproduce this reference myself, and I cannot do it either. It definitely seems to be a question mark for a lot of users (corrective action requests and product suggestions have been created on this topic several times). I will keep you posted with any relevant information as I get them.