I'm using my Slingbox Pro-HD with a Scientific Atlanta Explorer 8300HDC cable box. This cable box is an HD unit that includes built-in DVR functions which I access through my hand-held remote. When I set up the Slingbox Pro-HD the "remote" that is pictured with my setup did NOT include the controls for the DVR. Is it even possible to access and control the DVR functions on my cable box through Slingbox? During my Slingbox set-up procedure I selected the "Scientific Atlanta Explorer 8300HD" as my cable box since it was the closest to my unit (Explorer 8300HDC). Any ideas?