I see you're having trouble with the manual router configuration. Not to worry! Here's a website with port forwarding guides for Slingbox (and other programs!) on just about any router!
Hope this helps!
The Slingbox Forum Moderation Team
Okay, my SBS is now fully configured and operational. The non-operation of the pfsetup utility in the Slingbox installer still persists, but I figured out the manual port forwarding on the Netgear FVS318 - the key was that it is a two-step operation; first, you map the port number to an inbound 'service', and then you map that service to the IP address of the SBS. Of course, the Netgear manual is rather less than helpful, but I'd worked it out before TylerG's useful portforward.com link arrived - which would have saved me several hours of Googling!