Yes - that's link is where I got to. And, yes, I'd already done lsusb to identify the device but obviously can't install firmware at this time since getting that far is the problem!
Just when there seemed to be a light at the end of the tunnel it turned out to be a train coming towards me!
It may be easier to try a Debian based distro though will probably need to update Mint 8 - which I'm happy with and reluctant to disturb - or try Mint 14 in another partition (perhaps overwriting an earlier version of PCLos)...