Hi JPop,

It should work with a floppy created on SCO Unix 5.07.
I've done the same with SCO Openserver 5.05 and SCO Openserver 6.0 for a mega driver (Dell Poweredge 1800 Perc DC4)
You need to format the floppy first.

format -v /dev/rfd0135ds18

After that follow the following instructions (with your driver image of coarse)
I. Installation: OpenServer 6/UnixWare 7 installation

While installing OpenServer 6/UnixWare 7, be sure to
insert the mega HBA diskette before any HBA diskettes
supplied with your media kit.

In order to create an HBA diskette, take the following
steps:

1. Become root and create a new directory by typing:

$ su
Password: <type your root password>
# mkdir /tmp/hba
# cd /tmp/hba

2. Download the hba.mega.803.image file to the newly
created /tmp/hba directory on your machine.

3. Make an mega diskette from the image file using this
command after inserting a formatted floppy in your floppy
drive.

# dd if=hba.mega.803.image of=/dev/dsk/f0t obs=36b

4. Use this mega diskette during system installation.

Good luck.

Frederik