Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
You can get separate wallpapers using the standard NVidia drivers: NView -> Desktop Management -> Desktops -> Properties -> Allow different backgrounds per display.
Probably doesn't solve the icon problems though, and the monitor-specific toolbar of Ultramon looks good. (I do like NView's...
I've you've got an Nvidia graphics card, try enabling and editing the Nvidia Settings -> Desktop Management -> User Interface -> Edit Gridlines.
This does exactly what you want - you can setup gridlines to divide the screen up (arbitrarily - horizontally / vertically / evenly spaced or not)...