Perspective is not available to an MKIII only MKIV! I've tried to change the splash screen for years on MKIII's and was never able to get it to work. Your V22 is the last upgrade on MKIII, but if you want to try again on the splash screen, downgrade your MKIII to V17 or something then use the upgrade disk you made again. I've read that the image file has to be very small and the version number within the contents of the disk has to be different than is on your MKIII currently for the upgrade to actually occur.