Possible to convert / flash Dish network PVR reciever?

Neel2004's picture

I have a 80gb dish network PVR reciever that is a few years old that I bought for my parents. They don't use it, and I was wondering if there is any way to flash it and use it as a PVR for cable.

The reciever model number is dishpvr508, and I have comcast cable.

Thanks for your help.