Does anybody know a way to create a waypoint database file for uploading to the Map330 unit?

You can do it with the MapSend software that came with receivers in the USA. I use it a lot.

There are other products that will also work with waypoints. I bought one called PanTerra. It lets me get waypoints from the ProMark2 into a format that I can get into ArcView.

If you can read and write .csv files and figure out the right format you can use PanTerra to get waypoints in and out of other products.

Have you downloaded a Map 330 manual in pdf from the Magellan web page?

I am in Carthage, Tx have recently purchased Promark2's. I am pleasently suprised at the accuracy of the unit especially when WAAS is being used. I have checked in two areas to our old NAD 27 control based on several USGS 2nd order monuments 20 yrs ago (+/-2' or less!). My question is both uploading and downloading waypoints in N,E not lat & long? I am currently manually entering or writing down waypoints.