Just to add to that...
If you have a floppy disk option but don't have PXE enabled BIOS or NIC, you still can go for PXE based Remote boot. There are a few
floppy based solutions (PXE clients) out there. Just search on Internet (3COM, emBoot, RBFG.exe, etc.).
GPUser,
Could tell us why do you need to launch WinPE on your hardware? What are the reasons (TAP, etc.)?
If you tell us, we may be able to suggest more convenient options for you.
If USB is an option for you too, you can try to create a bootable XPe image to boot off the USB disk or so.