Hummm!!!! Don't know much about this subject.
From what I understand, like here in Europe, you can't clone the card but you can program your own. For the dishnetwork you need a ATmega autoroll wafer card (looks like a funcard).
See here:
http://www.huworld.com/dishnet.htm
Some files for this are here:
http://www.sattech.net/sdownload/index.php?op=showfiles&catid=1
http://www.e3mdish.com/dishnet/index.asp
http://www.dishtown.com/files.html
Hope this helps..
nobbly :+