Forgive me if I have mentioned this before but you need a program that reads Sysex. You also need to hook the X5D to the PC. This is just basic knowledge and sure you know that part. Since I don't know anyone that uses DOS I can't answer any questions about it...except that it is ancient technology. If you have a program that reads sysex you just go to the x5d bank site, download the 30 zip files (with 200 sounds in each) and then you can load them into the sysex program and send them to the X5D.