aye everything that can be done trough the ingame /macro and LUA system is ok according to blizz

ANY ADDON that requires an outside .exe to load... is 99% of the time illegal (think of bots, etc, who read/write directly into the memory allocations)

Keyclone is something that can be used for many things, open up 4 notepads, add the notepads to keyclone, and be amazed while you type the same document 4 times yay
Keyclone (and AHK and HKN) are nothing more than simple keyboard multiplicators

goodluck with multiboxerv2, or else fall back to twoboxtoolkit enjoy