I have a Zyxel Prestige 600 DSL modem from an Earthlink account. No longer have the account and wanted to know if the modem can be 'brainwashed' so that it can be a spare modem for other providers such as Verizon, Comcast, etc. I know that some group was writing linux code for routers. Is there anything to convert modems? Much thanks for your attention as I await your reply.