Since, SCO OpenServer 6.0 is based on an UnixWare kernel, the pkgadd command will need to be used to install drivers:
# pkgadd -d (full_path)/driver_name
For example, if the driver image resides in the root directory, the leading forward slash is needed:
# pkgadd -d /40002486_B.bin
Follow the prompts for configuring your adatper(s).