The maximizer you hear of:
WoW Maximizer is a program that strips title/bars from the window and defines where you want to run your WoW windows. It does 2 main things:
- Maximizes the application (removed the title bar & borders).
- Defines where to render this WoW application on your display.

For example, I use a 1680x1050 LCD for 4 WoW applications, so I have set up Maximizer with each WoW application to create 4 840x525 windows - one for each corner of the screen. I plan on increasing this to 960x600 once I get another 24" display at 1920x1200 resolution. There's no custom programming for WoW Maximizer - just an .ini config file to edit to give an offset on the display. On my 1680x1050 LCD, if I want a WoW window in the upper right corner of the screen to be 840x525 resolution, I set the offset parameter in the maximizer.ini file to be: 840,0,0,525. (Distance from left side, top, right, and bottom of the LCD - I *believe* this is the order of the settings - I'm not at home so I can't verify, but there's a line that explains it in the .ini file.)

There is also a line in your WTF/config.cfg (I believe this is the file name) that you'll have to edit to manually set the in-game resolution. I set mine to 840x525 to have 4 equal sized windows.