LoTRO multibox

Looking to run 2-3 instances of LoTRO. The different classes will be set up with the same buttons. Essentially I just need key/mouse broadcasting. From what I've read on the AHK site, this feature "Make any window transparent, always-on-top, or alter its shape." should allow me to have all game instances in the foreground in order for the pressing of key 1 to be pressed on the other 2 game instances as well?

As far as target assisting and following, I can create in game macros that assit the group leader/follow, as far as what i've read.

I'm looking for an easy and free solution to multi-box as i'm a casual player and don't have time to really group.

Would AHK fit the bill as far as my needs of having the same button pressed on all screens? From what I gather from reading about it, it seems so but would like some reassurance.

The only thing i could really ever get working with lotro is isboxer.