I need a custom boot floppy.

I installed QNX 6 under windows, now I want to try it on my old
Pentium 75 laptop that doesn’t have PCI. QNX 6 supports the SCSI
controller in the Dell Advanced Port Replicator, but the aha2 driver
apparently isn’t on the boot/install floppy image.

What I need are step by step exact instructions for creating a floppy
that will have the aha2 SCSI driver and NOT scan for PCI stuff. Then
I need to disable PCI scan after QNX 6 is installed.

Please do not assume I know anything about QNX/Linux/Unix. I just
want the thing to work so I can use it.