Hello fellow Diablo 3 multiboxers !

I'm quite new to multiboxing, but i've been very interested in it.
I read many guides already (especially the Newb's Guide to Multiboxing, very useful thanks you !).

So i've been wondering about Moving in Diablo 3.
I already know that broadcasting mouse button clicks is quite easy and can be done in many programs such as AutoHotKey or HotKeyNet.
But i'm used to hold the mouse left button to move my character around.

So i've been wondering if that behaviour could be done in these programs or others (free ones) ?

Thanks you very much !