Just cos the SuSE can see the modem, it doesn't mean that you don't need the driver(s).
Have you checked out the modem here
? Cos that seems to be the place that has lot's of the answers in respect of winmodem's.
Failing that, as you're in Enfield, sign up to a cheap ADSL service - but don't go for a USB modem, cos they can also be a pain to config. I use a solwise modem/router into an ethernet card and it work's a treat heres
the place to find out the relevant stuff on prices and hardware etc