I have had a NUVI 5000 (Garmin) for a few years and have not attempted to do any customizing.
We live in a motorhome and would love to have POIs for (a) RV campgrounds, (b) walmarts, and (c) elks lodges.
I have loaded the POI loader onto my computer but I am now at a standstill. I am not a computer expert, so I would appreciate it if all recommendations were on a step-by-step in simple English.