Thanks for the replies...
I downloaded and ran a nice little script called 'netdriverinfo.sh' which when run shows the following:
Make/Model - Intel Corporation: Unknown device a02c
Ethernet controller - Intel Corporation: Unknown device 10e8
VenIDevID - 06:00.0 C
Driver Name = No driver loaded
Driver Version = No driver loaded
and for 06:00.1, 07:00.0 and 07:00.1
I then downloaded the e1000e driver and compiled but have the same issue.
According to the release notes, the driver (and the default e1000 driver) should work as expected with the 2.4.x and 2.6.x kernel, appreciate I could upgrade the kernel to a newer patch level (which I may do as a last resort) but still caan't understand why the card is not being recognised.
Will continue my investigations, thanks...