[ubuntu-uk] Anyone any ideas on running a distro from an external USB drive?

[Sean Miller]

I now have Edgy running on my main drive, but would like to be able to 
install various different distros on external USB drives but I seem to 
be coming up against the problem that at the time grub runs the USB 
drivers have not been loaded so it can't be seen...

...it's obviously fine once that Edgy itself has loaded, but clearly 
we've already booted by then so that's no good.

Does anybody do this and, if so, what is the key?

Sean