I have hundreds of old MDs that I made in 1990. Some are digital copies of a digital source, and some are from an analog source. Now I want to transfer them to my computer (currently a 64-bit PC running Vista, although I would buy another computer if that will make it easier). I bought a SONY MZ-NH600D Hi-MD Walkman. Although it will transfer from MD to computer, apparently the walkman will only transfer those tracks which were originally recorded to the MD from that same computer. But all my MDs were originally recorded to MD via old Sony MD decks (like the MDS JE-S550??). What equipment or software can I get to make this happen easily and digitally? Thnx