Welcome, I just started dual boxing myself, but with only one monitor. Kind of sucks right now.

Lots of info to read here, I don't even understand it all. (Like how do you even bind an action to Alt+Ctrl+Shift+3?) Anyways...

The program is keyclone, and it costs $10, and it's extremely simple to use. Like...really, really simple.

As for macros, right now I only use two since I don't understand them at all, or what I can do to make it easier/better. I use

/target "main"
/follow

and

/target "main"
/assist

So I have a lot to learn as well.

As for leveling them at the same time, I'm pretty sure it's recommended that you do so. Right now I have a level 11 and a level 9, and even that is kind of difficult to manage for me, I need to bring the level 9 up to really make them work well together.

Read the stickies for a lot of information. Good luck to ya.