sb5100i help please...

Hi folks... ok im newbie at this stuff...so be gentle with me please

i have the above modem..id like to flash it with haxorware

ive grabbed the firmware .. now where do i buy a cable (usb if poss?).. im assuming i need a jtag cable to do this.

and some utility program....

ok, basically an idiots guide on how to flash my 5100i

thanks folks