I had similar issue with Primo POIs the poi files that come with maps are stored in the folder you stated \primo\content\poi
speedcameras in the speedcam folder, user pois are stored in a file called user.upoi in folder \primo\save. I found the easiest way
to create, edit, name, import and generally manipulate these pois was to use a program called User.UPOI Editor its available
from references in the sys.txt actually point to incorrect places unless you are storing
or sharing maps and pois with igo8 you dont need to specify folders in sys.txt, my sys.txt entry is below as i have primo on sd card
with igo in my gps flash memory hence the need for my additions to primo sys.txt as below.
hope this helps ive tried to explain as best i could feel free to ask for clarification if needed