Some DVD/CD players have a recess in the middle of the tray that comes out. If it is slot loading I would advise against putting it in. And you should be able to download the software from the Internet if you need to. Go to the companies website and search for “drivers”.
edit :: I should go back to bed. I can’t type this morning.
@hairy- ha!, no. but if I hadn’t read before hand about the slot drive incompatibility with these disks I prolly would have! (my m.o.: act stupid first and break out the tools later)
Adaptor rings (that snap around the disc and make it up to full-size) used to be pretty common, in the days when CD singles were often 3” too. You might hunt for one in a charity store, independent music store, or a good computer hardware store. Or ebay.