Windows Vista failed to recognise a Belkin F5d7000 Wireless G PCI card and as it is an old card the original driver disc only covers up to Windows XP.
Turns out there are currently 8 versions of the card as the Belkin support website explains. This particular card is a v3 [see the label on the card itself - v3000uk] and no specific Vista driver is listed on the Belkin site for the v3 card. I blindly downloaded the v8 driver and installed that after which Vista still protested the card was not working.
A Blog post by Chris Pietschmann suggests that the Atheros Wireless Network Adapter driver that comes with Vista will work for the Belkin F5D7000 card. Thinking this was worth a shot I restarted the machine to find that Vista had recognised the card. So it looks like all it needs is the v8 driver and a restart.
