Thread: Speedcam_category descriptions explained

You can correlate the speedcam_category with the description from activated_speech to get which alert has which type value, but

Spoiler: .

If you are not using any skin or branding that overwrite the information in data.zip, then you do not need to copy it to sys.txt
You can verified this easily by running proggy without any skin* and alerts should work. Then with a skin and alerts doesn't work, you can put in sys.txt and alerts should again work.

* Note that skin do not need to be .zip, they can also be unzipped so care should be taken to remove those directories/files as well