OK - its works
I messed about with settings, and in the BIOS i set the Jmicron to RAID
On booting, i did a CTRL + J to enter the RAID setup , and it told me there were not enough disks to make a Raid array - no problem , it left the disk showing up as Non-Raid , and i exited.
I let it get into Vista, and the "installing new software" bubble came up. Once it was finished, i went into device manager to see what was new, and under ata/Ide controllers, there were 8 entries for ata controllers, 4 channel 0 , and 4 channel 1 , with an exclaimation mark on them.
I downloaded the latest drivers for Vista on the Jmicron site, and installed them.
When finished, the drive came up on autoplay, and was present in Explorer.
A couple of reboots later and the drive is still there.
Intel Core 2 Duo E6400
1x120 GB Hitachi Sata Drive
2x250 GB Maxtor Sata Drives
1x120 GB Hitachi eSata Drive
NEC 5170A DVD rw
Nvidia 7800 GTX
Antec 500W PSU
Samsung 22" w/