I thought you know what you were talking about when you said bridged mode. If your router is already configured in bridge mode (as you were using with your "other" operating system

) then no need to fiddle with your router.
Just go to YaST->Network devices->DSL
and run through the wizard.
You can then use KInternet to make a dialer (like the dialer in your "other" OS). It will be near the clock once activated