I'm gonna come clean to all of ya'. When I boot my tweener to get something written to a 5.25" disk -- I boot to DOS!!! No USB, no HD, just A:, B: and a very large RamDrive. So, if Thomas wants to do it this way he's gonna need a dual floppy controller. Bottom line here, it works every time and there are zero conflicts. In the event I need to access the HD on that machine which happens to have a 10 gb drive in it I boot from a WIN ME boot disk which recognizes large disks and gives me access to the entire HD. I just don't like to be running WinBlows when I'm doing old DOS stuff.