Of the user manual. http://www.amazon.com/Canon-ZR45MC-MiniDV-Digital-Camcorder/dp/tech-data/B000063W93/ref=de_a_smtd might work here.
It does have firewire and in the diagram and manual I couldn't find how to move video over USB.
Your laptop will have to get a firewire card but which laptop do you have?
Bob
I have a Canon ZR45mc camcorder and an Acer netbook. I read on other sites that a firewire cable is needed to transfer the videos to the computer, but there are two problems. One is that my computer only has USB ports. The other is that the camera has a port labeled for USB and not firewire.
So despite the fact that every source says this camera does not work with USB, this camera only has a USB option. But, as they predicted, it does not seem to recognize the camera.
Any ideas on how to proceed?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic