TiVo HD to Premiere upgrade process

I'm looking to upgrade from a TiVo HD to a Premiere. Will I need to contact the cable company when I do this or can I just take the cable card out of the HD and put it in the Premiere?



Also, what is the process for activation? I currently have the HD and a Premiere both month-to-month with multi-service discount. If the new premiere is also month-to-month, what do I need to have TiVo do to transfer the service? Can I do it online or do I need to call?



Finally, if the Premiere I get has lifetime instead of month-to-month, would anything be different about the activation process?



Thanks...Scott