So the question is how to get my other 4 layers for the gerbers?
In my time, we read the manual. The new generation seems to hate reading...
Check Help -> Generating Output -> CAM Processor
Use the attached cam job as an example. Open it in Eagle and check if the layers correspond. Remove the section for the v-cut (you'll probably don't need it).
Save it for later use. Before running it, create a subdir "gerber-excellon" in the project dir.