I want to get an old Mac running and hack it up, but when I turn it on, I get a floppy disk icon with an "X" in it. I have a disk that has "System 6.0.8 & Printer Tools", but if I insert that, I get a floppy disk with a question mark in it, and the disk ejects. I have an external HD. Can a modem be used as a keyboard and mouse hub? If not, where can I get a mouse and keyboard?