Thanks for the help. For some reason when I had tried using maximizer on its own, it wasn't stretching the windows correctly.
My issue was the lack of knowledge around the commands to actually start the instances of WoW, so the first post that you put up helped greatly. When keyclone starts them they come up perfectly.

I am starting with a 3 man team (1 warrior, 2 shamans) and got them all to lvl 9 last night before I went to bed. (not bad since they are classes that I have never played before).

Thanks again.