I am sorry, I do not fully understand the issue; is the Intel® SSD recognized during Windows* installation? I believe it is better to use the SATA ports from the motherboard itself.
There is no SATA port or I would have used it. It is an old machine made in 2004. I used a Star tech PCI Sata card (PCIESATA2I).
The BIOS detects the drive but does not recognise it. It appears as 'unknown device'. Windows recognises the device but when I try to install an operating system it warns me the BIOS will not boot from it as it is not enabled. I have set the SATA 1 & 2 in the BIOS to auto and the primary master/slave drives to auto so it should be enabled.
The issue is I need to get the BIOS to recognise the drive.
Well, I guess the service manual I attached above is for a slightly different model.
You may check the Intel® SSD firmware version using a different computer, and update it if needed; hopefully you will have the chance to do so and to update the BIOS somehow. We also have to consider the possibility of a compatibility issue because of the difference in age of the components involved and because the PCI/SATA card may not be able to properly recognize the drive.