With programs like MAPC2MAPC converter it should be quite possible to transform map data to various formats. It is also able to convert Google Compressed Keyhole file (.kmz) to OziExplorer map files(.map).
Convert Compressed Keyhole Markup Language (Google Earth) data to OziExplorer map file.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert kmz to map on Windows
A digital map conversion software
Convert from kmz file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.