This may not be the best way, but I use a capture card on my PC to copy from the 508. Would be nice to copy directly from the 508's HD but I don't know how to.
Get a panasonic or like dvd recorder. I use a dmr30 to record from my 501( and my 6000u down rezzed) have complete survivor series since the start of thailand archived
Here is another way, but it is not for the "weak at heart". But it does work like a charm. Check out the DishRip group at Yahoo.com (http://groups.yahoo.com/group/dishrip/).