If you're playing for CD images, you have to stop emulation and load the next CD image to switch disks. Most, if not all, games offer a save right at the point of switching disks. Save, go back to GameEx, select next disk, load saved game. If you change file names, and GameEx doesn't automatically refresh the database, you'll have to do it manually. You can do that in the advanced settings application. As for cleaning up the names, check the settings for options to hide extraneous characters such as underscores, the file extension, etc. I believe there is also be a PSX game database included with GameEx that has not only names, but descriptions. You can attempt to use this database by selecting it in the emulator options, but I think it will require your CD image files to have very specific names. Unfortunately I don't have any experience with this particular database.