What country/region are you in, and what kind of files did you get from POI-Plaza?
Some speedcam (text-based) files are here:
speedcamsand if you can use them, it's just a simple matter of putting the *.txt file in the {Primo}/content/speedcam folder, restart Primo, it will build the database (takes a minute or 3 just the first time with a new text file), and there you go.
Then, go outside, get a satellite lock, and enable the warning in Settings->Sound and Warnings->Alert...., and accept the disclaimer (you only have to do this once, then it will remain enabled).