1. Firmware that shipped with the DNR is 1.3. Do I upgrade straight to 1.5?
There shouldn't be any reason to go straight to v1.5. Each version expands the number of supported cameras -- newer models may not be supported on older FW versions.
If you want to use the Wizard software (CD) that came with the device, you should run the wizard software before upgrading. With many D-Link devices, newer Wizard software is required to match the installed firmware version.
2. How do I use DView Cam with DVR?
You don't need DViewCam. The DNR-322L can manage all recording and monitoring.
3. How do I register DNR with my dlink?
The setup wizard will prompt you to add the DNR-322L to mydlink. After you upgrade the firmware, go to mydlink.com/support and download the latest Wizard software. The wizard will setup the device, search for cameras to add, and ask you to register with mydlink.
4. If my some dlink cameras are on another router, how do I monitor with DNR?
In the web UI under SETUP, there is an option to manually add cameras by IP address.
* I encourage you to go to mydlink.com/support and download the user manual (PDF), which contains screenshots and step-by-step instructions.