I just got a pair of ultrawide monitors and LG's software didn't really cut it for me, so I went searching the internet and found this amazing software that enabled me to to things just my way.
I use the main monitor in landscape while the second in portrait, so I set it up like this for the main monitor

And for the portrait monitor:

A couple of notes:

• I did this mainly by observing the examples and the built in help, so I think there is room for improvement (just now found out Tyinsar's awesome tutorial)
• There are gaps between each region, which I don't know how to fix yet
• I didn't really pay much attention to triggers because I pretty much use keyboard shortcuts
• For some reason, Notepad++ won't accept the keyboard shortcuts

Hope my custom grid can be helpful to someone!