Better late than never I guess, lol, missed your edit until now, and apologies if you've already got an answer in another thread.

I also use my own custom POI's as well as the Australian POI's that come with the map release content.
My custom ones I always have them running from the Save/Profiles/01 folder as a file called user.upoi, name them AA-mine-AA within the program, then when searching or looking through them all my custom ones appear in one group at the top of the search with the name AA-mine-AA so no scrolling required to find them.
Any new ones I create while out somewhere I put them in that same group at creation, easy to find later if needed.