
Board: M.U.G.E.N Configuration Help
Saojin Stage worked for me fron this link: http://mugenguild.com/forum/topics/yugas-1-1-zoom-stages-update10012016-168489.0.html not sure about the others yet since I haven't tried them. Currently busy.
You can also use this (http://mugenfreeforall.com/topic/28008-help-me-convert-stages-to-1280x720/) as a guide to deviate a way to make the stage fit, just change the numbers accordingly. You can use shift+f4 while in the stage to refresh the stage when changing the codes btw so you don't have to close and open mugen again while experimenting.
But yeah, some stage just weren't made for the widescreen resolution I guess.