Hi
I can sympathise. I have the same Sunrise package. I did have my own wireless router and did manage to configure it once I found a helpful support person. Their first response is usually 'if you didn't get the router/modem from us we cant help'. If you tell them you only need the basic connection data (sounds like you know what they are) then you should eventually get somewhere.
Interestingly, my 'old' linksys wireless router kept failing, especially in the evening. I became convinced it was sunrise and capacity at fault. After several support calls I gave in and bought their own wireless router (they sell it at a big discount). All my connection problems have disappeared ! Guess it was the kit after all...