Don't bother with an install, just copy paste and it works fine.

As for the resolution, the best I could think of using one monitor won't use all the screen, as I try to keep aspect ratios the same so that if you need to use PiP (picture in picture) it doesnt look munted when a slave goes to full screen. 800x600 doesn't look good on a 1920x1200 monitor.

What I'd use if it was me, considering you have a huge monitor:

Slave1
x: 0 y: 0
maximised res: 640 x 400
actual res: 1680 1050

Slave2
x: 0 y: 400
maximised res: 640 x 400
actual res: 1680 x 1050

Slave3
x: 0 y: 800
maximised res: 640 x 400
actual res: 1680 1050

Slave4
x: 0 y: 1200
maximised res: 640 x 400
actual res: 1680 1050

Main
x: 400 y: 640
Maximised res: 1920 x 1200
Actual res: 1920 x 1200

That should work .. i think. Hard to test it when I'm not at home
It should end up being the 4 slaves identical sizes going down the left, and your main taking up most of the screen with an empty bar up the top that shows whatevers in the background.
Could be useful if you wanted to chuck something such as WoWhead up the top, who knows