Mouse Broadcasting works on one PC with KeyClone?
It works on one pc, but I never got the mousebroadcasting working (other than buttons, and i don't know if its even possible) with keyclone.

A good program you can use for mousebroadcasting is HotKeyNet , which you can use for only mousebroadcasting in addition to keyclone, or as an replacement of keyclone, as it can also handle the other Features, like Maximizer, Round-Robin, PiP and so on..

..one thing to mention is, that it is mainly configured via scripting (which i like, but may be not everybody) and therefor can do some realy cool stuff.
It is very well documentet on the website, and its author Freddi or the HKN-Community will help you if you have any questions.
And btw. it's free in its current state!

For a quick impression what you can do with it, regarding mouse broadcasting, see: [HotKeyNet] HotkeyNet + AOE!

Getting your trees should not be a problem, if you can life with a little inprecission!

Another thing to mention is, if you want to get deeper in it, thats it not a key/mouse-multiplexer (like keyclone) but an 'hotkey-program'.
This allows you on the one hand, to simple use it together with keyclone fpr broadcasting only the mouse, on the other hand if you want to use it as a full multiplexer its a little bit more complex, because for example there is not realy an 'broadcast all keys'-option and so on...