How do I convert an OSM file to an OziExplorer compatible map?

See if THIS helps you out. You should then be able to save it as an Oziexplorer compatible map.

Regards

The free software program GPSBabel should convert the files

You haven't mentioned what format the OSM maps are in, or the target format (.ecw?). Having that info might help others to help you.

Even googling "convert osm to ecw" or similar might give you the answer.

Hello - I use this

Mobile Atlas Creator

You cant convert existing maps but you can just load up OSM as the mapsource and it will creat a ozi compatible png file + calibration file for the area you select. If you need to you can then convert to OZF (ozi specific format) format using this

img2ozf program

Bit of a learning curve involved but the programs are all pretty simple.

Cheers
Greg