So thanks to @atrax27407 for finding a bug in my OoeyGUI v3 MESS/MAME loader and kicked me into coding mode.
I'm working on version 4.0 to fix a few bugs and add a some new features. Quite a few, so i'm going to version 4.0.
new options:
Selection for full screen or window mode
UI Key remap, which is the ability to allow a user to remap the key used to put MAME into partial emulation to allow the user to bring up the UI OSD menu. This was done bec