The update i tried to install (at least 15 times, with different cables, settings, computer etc.) didn't complete, but the GC seemed to work, but i had no maps.
I Tried to figure out where it went wrong. After Unzipping the install file I found out that the script conains a file: \eXplorist_2_15\COPY_GROUP_9\MAPWWEU_BM.mgi of 1.17 GB, while the space left op the exporist was around 500MB, that doesnt work!
So I transferred the old map data file ( in \APP\MapData ) to my PC and gave it a retry..TADA that was the problem.
Now the script succeeded perfectly..