If you're really stuck, you can always get a NULL-modem cable and connect your PC to your amiga via the serial port and use a program such as transdisk to transfer files over (or if the files are small, you can route them to RAM-DISK via the TYPE command, but this command has buffer limitations)
I would really only recommend this as a last resort however as it can be very frustrating to get set up properly, and the file transfer is SLOW.
