@Addison
first I would upgrade to the latest DC 1.0.4-5, I think it is the best one yet with built in notifier. Second, please read this blog for detailed instructions.
http://www.fromthefencepost.com/2009...ice-and-gizmo/
Hint: You want to change your account from Grand Central to Google voice in the drop down arrow on the right above where you put in your account name. Also you don't need anything on your home computer is you set it up right. So check out the link above it really covers everything.