First you would need to have your Slingcatcher connected to the remote video source at all times.
Then you would easily connect it to something like the Vulkano box that can control your Slingcatcher which will allow you to set up recordings.
But you would need to create a special remote code for an extra box to control the Catcher.
Wouldn't be too hard to do though.
But this is a topic for elsewhere since we would be discussing other products not Sling Media related.