It looks like your link is for a "IR to UHF Remote Kit", which I don't know if they still sell or not. I don't know the prices and if it will work or not.
Dish now sells a "IR to UHF PRO Remote Kit" which will work on the 311. The prices I've seen range from $49 to $59. Here is a link with one for $57 at Sadoun.
http://www.sadoun.com/Sat/Order/Remotes/Dish-Network.htm
Can any Dish IR remote, control your capture card? I don't know.
You need an easier way.... I guess the spouse going and change channels is out of the question.
Per the 311 User Guide:
...On Page 35, under "Using Timers" it tells you how to set timers to turn on the Sat Receiver, Change Channels, then send a very strong IR signal to a VCR to turn on and start recording.
...On Page 41, under "Setting Up the Receiver and VCR to Use a VCR Event Timer" it tells you how to get the 311 to communicate with the VCR using IR.
I recommend:
...(a) You get your PVR-150 to work with the remote that came with it.
...(b) Then try to get the 311 receiver to control the PVR-150, they must be in the same room and the 311 IR transmitter (front upper right), and the
PVR-150 IR receiver, must not be blocked by smoked glass, wood doors, etc...
...(c) If you get the above 2 to work, then purchase a UHF PRO remote kit and you should be ready to go.
...(d) If you can not get (b) to work, then you may try to find a generic IR extender that will allow you to remotely control the PVR-150 via UHF. If its using unique codes, that may be impossible. Here's a link to some:
http://www.sadoun.com/Sat/Order/Remotes/Remote-Extenders.htm You may not find a single UHF to independently control the 311 and PVR-150.
Good luck.
PS - If you find something to work, please post, I know there are others using the PVR-150.
In fact, if you need technical help on the PVR-150, you may want to try a new thread with PVR-150 in the TITLE.