You can just turn Airport off which will disable the internal wireless. But why do you want to do that? Airport is one of the very best IMHO.
No, you cannot use 3 inch CD with the superdrive.
I think in your case the faster way to get music from 3 inch CD onto a Mac Mini is to rip them into AIFF or Apple Lossless using iTunes for Windows and than transfer the files to Mac Mini through network connection. If the two machines are not networked together than copy the files onto an USB keychain drive. It beats burning a bunch of CD-Rs.
No, you cannot use 3 inch CD with the superdrive.
I think in your case the faster way to get music from 3 inch CD onto a Mac Mini is to rip them into AIFF or Apple Lossless using iTunes for Windows and than transfer the files to Mac Mini through network connection. If the two machines are not networked together than copy the files onto an USB keychain drive. It beats burning a bunch of CD-Rs.