I was able to create screen type of 7680x1080 in previous versions before 4096x4096 limitation was introduced.
I had 4 1920x1080 divisions inside 7680x1080. I remember there was problems with that size but I overcome that by creating 4x 1920x1080 scenes and assigned each to each division and all worked perfect until upgraded & 4096x4096 limitations were introduced.
I know what I am talking about I WAS one of the original enterprise subscriber of Media Signage and frequent helper on this forum.
One of my posts dating back to 2011
I am using Version 2.2.1088,
So I have Screen setup as 3200x1080 and then 3x Screen Divisions
If you saying Studio 2 had limitation of 2048x2048 then How come I had 3200x1080 setup in Version 2?