I have an Apple ][gs that was left in the attic when my dad bought the house. My son, 12yrs old with Autism, loves vintage computers and I have been unsuccessfully trying for a year to get this one running for him. The disks that were with it, I accidentally formatted and erased disk 1, I ordered another set online and when I load disk 1 I get to where I insert disk 2 and then I get an error saying it can't find PRODOS.. I know my terminology is not great, but, it has been almost 30yrs since I have worked with a computer this old...so I guess i am really a noob... :).....how do i fix this!!?