As for the mouse, there is a simple solution, if you have the same problem I had. Just go to your BIOS and disable the USB Legacy support. That helped me after banging my head at the wall for two days and coming up with my own solution. But all the time the solution was one click away
Hope this helps. As for the unable to mount 2nd CD. I don't know. Maybe some bad CD's? or something. But that shouldn't be important. Even with bad CD's it should work(mount), right?