nctry_Ben wrote on Jan 9^th, 2011 at 8:57pm:

MapSource came with my Garmin 60csx on a CD. Not sure if White Cedar got that or not. I'm learning myself. My question to DD would be... Do you need to remove maps from your GPS to add maps? Or do you just add maps and the older ones just dissappear? I put on some Minnesota Topo's and BWCA waypoints. And when I load the WCPP Topo's and waypoints it sort of messes up the BWCA maps like the older info is replaced even though they are in two seperate areas.

It is, by-in-large, a replacement operation.  

What I typically do is create an independent file for each park or area.  Then prior to a trip, I'll make selections from this "master" area and paste them to a "trip file."  This tends to reduce overall clutter and makes processing a bit faster.

When you load up your GPS, you'll likely find many of your previous entries replaced.  This is in part due to multiple items having the same name.  For example, if map 1 has waypoint 1 and map 2 has waypoint 1 ... if file 1 is loaded "over" file 2 then waypoint 1 from map 1 is replaced by waypoint 1 from map 2.

At least on my system, when I upload new tracks & routes to my GPS, it will "over-run" the GPS's storage for those entries, but keeps the older ones that are not replaced.  This is one reason why I tend to "clear all" entries from my GPS before loading new material.

dd