Thanks. I tried the default guide, as they don't have a guide for Zend Debugger. Unfortunately, it set my remote ports to be the same as my local (LAN) ports.
I've contacted Actiontec support, but they sent me an email saying that they don't offer support, and that I would have to contact Telus. Telus says that they also don't offer support (other than setting up wireless), and that I would have to contact Actiontec.
I'm really stuck.