The best method I found was to put your sim into another phone, and collect all the settings.

It will ask for all sorts of thing: go through the connections wizard: it will ask carrier name, username and password (they are identical on all devices, try a search - though the ones I found for Orange were wrong). Then under 'advanced' click 'use proxy' - and enter the proxy and port numbers. You will be able to find them all by putting your card in an old phone.