From another forum I got a link to a downloadable program that allows you to download images from Google earth as calibrated OziEplorer maps.
It took a bit of trial and error but I managed to get it working.
The produced maps that I used are dead on.
Maybe it's to some help for some of you.
I don't know how reliable the program is in regards to use the google facility but I found it to be of good value.
This is the message I reacted upon:
There is a free program that will take Google maps (and satellite
images) and prepare them for use with Ozi. It is particularly useful
for getting very detailed street maps of the US, Canada, and, maybe,
parts of Mexico.
The program automatically stitches map segments together as needed and
it prepares the necessary .map file. So far, the maps I have used have
been dead accurate for calibration.
The program is called GoogleMV, and it is available at the following
address: http://www.silber2004.narod.ru/GoogleMV1.zip (this is the
download address). The program is a stand-alone that does not require
installation. It includes a ReadMe file in English.
The program intially starts in Russian, but you can switch to English
by clicking on the "gear" symbol, then selecting "language" in the menu.
Edit: I used this program to get more detailed maps here in the Netherlands to find some Earth-caches. It delivered great 'maps'.
But since Google doesn't cover the whole globe in hi-res, results will be different from place to place.