Capture Statement for USB

I have 25 clients running Win98 and an old legacy DOS database (server-based on a Windows NT 4.0 network). The DOS program will only print to LPT1 or LPT2. I just installed new printers (local) on each client’s USB port. How can I capture this port so that the DOS program thinks it is LPT1? I made this change over the weekend and no one can print right now–please help!