having the same problem with my GEN IV DVR. SBC's DSL IP changes constantly so remote access is a real pain in the #$%. I had hoped to use TZO a service which gives youa pseudo static IP for about 25 bucks a year. It works by assigning a domain name to a certain IP, when the IP change the client software notifies the TZO instantly who then changes it's database of addresses. Bottom line is you get some of the functionality of a static at a fraction of the cost. Problem with the GEN IV client software is it requires an actual IP to point it in the right direction, I cant' add the domain name instead . Looks like I'm going to sign up with Earthlink and pay the DSL fee as well as the xtra $15 a month for the static.... bugger.
BTW if you can access your DVR using a domain name then check out TZO at http://www.tzo.com/