I mean vms, not vmu, but yes, I can't explain it but thats what happened, in order to use memory pack, i had to first delete all the crap that was there in the "memory pack" through the dreamcast bios, then that got me to where i can save games and save changes in bios, it saved my english language selection, but after a few games and saves later of MVC2, i tried to play Jet Grind Radio and it wouldnt load... then, I tried to play MVC2 again and that wouldnt load either, what it did was popped up with asking me to change the time in the bios and wouldnt go past that just kept looping to changing the time (setting back to default every time) so i replaced the bios, made it read only, still wouldnt work, so i exported my MVC2 game and deleted the vms, which allowed them both to work.