I just got the GPD XD today, and I tried googling and messing around with the system to find myself. But, is there a way to customize the emulator screen? Add new systems aside from the default arcade,n64,sfc,dc,ps1? I added more folders but that doesn't do anything, I assume I need to tie them to emulators but I don't see a way how. Also can I change the default emulators for the categories already there?