OK I think I'm with you now - I was answering a question you weren't really asking!
Since it's asking for a .DRV file, I'll assume you are running under Win9x. With FPW closed, go to the system Start menu, and choose Settings -> Printers. Change the Default printer to a something other than the one you have right now. (If you only have one installed, install another one and assign it to LPT1 - don't worry about whether you really have it! Just don't do a test print at the end of the install.)
Now go into FPW and see if you still get the error. If you don't, then you may just have a registry, Win.INI conflict. Check to see if your WIN.INI file has Devices and PrinterPorts Sections and that all your Installed printers are listed. If not, then you may need to reinstall the "missing" printer driver.
Remember that FPW was written for use in Win 3.x, and it uses the WIN.INI file to get a lot of info, unlike the newer apps that use the Registry. (The Win 3.x registry was quite a bit different than what the 32-bit OS's use.)
Rick