You're going to have a hard time getting an answer when you frame your question in this way. You're essentially asking the community here to tell you how to multibox without using the explanations that have already been written for the wiki and stickies. There probably won't be a lot of takers; the wiki and sticky threads are, for the most part, the clearest information we have.

Can we focus on trying to solve one problem at a time? Let's try to get your follow problem worked out first.

What sort of setup are you using? Do you use one machine or more than one? How are you broadcasting keys to your WoW windows? Or are you an alt-tabber? What addons do you use? Have you tried writing macros?

Give us some more background and I'm sure we'll get you on the right track in no time.