I don't think you need ZoomBrowser installed to change the Owner field, just the EOS Utility. This is what I did:
* Connected my XTi
* Opened EOS Utility (v1.1.0.8 )
* Clicked the button next to "Camera settings/Remote shooting" (in the middle under "Set up camera/shoot remotely"), which brought up another window titled "EOS DIGITAL REBEL XTi"
* Clicked the wrench/hammer button in the bottom right of that window, which drops down a new section
* Clicked on the Owner's Name line, filled in my name, and clicked OK
I wasn't sure if it would apply the name to the camera, or just pictures taken with the remote app, so I unplugged the camera and took a picture. After downloading the picture, it had my name in the field.
That dropdown menu has a few other features as well: You can change the time on the camera, set it to the computer's time, and even have it automatically set it to the computer's time. You can also format the memory card in the camera and upgrade firmware (provided you have a firmware file).
_josh