I'm now convinced that the Dell 2350 just can't do this because it doesn't support PPTP in any fashion, making it a less than useful device for the European market. I found one, the BuffaloTech WZR-RS-G54, but there's some confusing language in their manual.
Does anyone have any links to European boards where this sort of problem is discussed? English would be best for me, but Dutch would be just fine for the person with the problem!
Thanks for any help anyone can offer!