you will need to tri flash it with a 9pin to 9pin null modem cable with the rs232 tool for the f5 box which I have just got not tested on the f5 as yet so hope it works as there is no uthere tool as yet for it
yes it cud be I get most of the firmwhere direct from the ones that make the boxes and just a hort bit of whot it duse and as thay send new firmwhere I post it for every one to use