4900 Coverted to Bev switch over

[freedomfighter]

I have a 4900 reciever that I bought and it was already switched to Bev. I would like to switch it back to Dish. The guy I bought it from told me this would be easy to do. Unfortunately I can't get a hold of him. I have all the nessacary things to work on it (iso programmer, quad jtag) I am a newbie in this area but would like to learn how to switch this back to dish.
Thanks for the help.

[Chapster99]

Point your pan to one of Charlies birds. Then connect jtag, plug in power, open Jkeys, Flash Programming, use drop down on right and select SA30. Hit erase 3 - 4 times. Then connect back to stream (Charlie's) no card in slot. Leave it alone till the update completes. You'll then have DN FW

[freedomfighter]

Thanks for the help. Now Another question..........Is it possible to read my stuff before erasing it? Like the card and the tsop ect.... and if so How?
Thanks