ok, a new version of GameEx was released today that suppports automatic mode of the GP-Wiz49 based on the information in controls.ini.
7th April 2005 - Version 3.50 of GameEx available
Right mouse button now does a navigate back
Fixed Issue with Alpha page down not working when DirectInput is being used.
Jukebox now includes a new one click feature to queue all songs for an Artist, Album or Genre.
New setting, to choose whether to process a game image or video on a thread (more responsive), or immediately (faster).
Maximum size of Game list is now 45000 instead of 35000
New setting to run an app or bat file before launching a MAME game and after. Game and ArcadeVGA resolutions, Rom name, Control mode and Game name can be passed to the program.
GameEx now does does automatic switching of 2/4/8/49 way modes based on the selected game and controls.ini. A World First!
http://www.gameex.net/