credits to Symbian Underground
These maps also work on Ovi Maps 3.0 beta
Make sure to choose the right type of map. To check your version of Ovi Maps or Nokia Maps select "options" and choose "about" in Nokia Maps or Ovi Maps on your phone.
If this is not the right version for you choose another version here.
Update: someone on the Nokia forum managed to fix a "map layers out of sync" problem by allowing the maps application to go online once. Should you face the same problem, this solution may work for you too.
Instructions
Run Ovi Maps on your phone once before you add any maps or voices. This will create the required folder structure on your memory card.
Unzip the downloaded map files and drop them into the appropriate folders on your memory card.
On my Nokia the folder structure is cities with a subfolder called diskcache, filled with 16 subfolders called 0 to 9 and a to f, and each of these folders have another 16 subfolders 0 to 9 and a to f.
Map files have the extension .cdt. Example:
[memory card]\cities\diskcache\[0-9, a-f]\[0-9, a-f]\filename.cdt
• On some Nokia phones (like the N95) maps are stored in:
\Private\20001f63\diskcache\[0-9, a-f]\[0-9, a-f]\filename.cdt
• To install, just drop the 16 folders called 0-9 and a-f into the diskcache folder.
• If your phone has both folders, get a small map (for a single country) and try both folders to see which one works. Even Nokia's own map loader doesn't always get it right. Details on the Nokia discussion board.
• You may need to tell your computer to show hidden files and folders.
ESTA TODO EN UN DOCUMENTO DE WORD , PARA DESCARGAR LA APLICACION Y MAPAS ETC , EN EL WORD PONEOS ENCIMA DE LO QUE SE QUIERA DESCARGAR Y PULSAR LA TECLA CTRL Y CLIC CON EL RATON Y SE OS ABRIRA EL VINCULO.
Salu2
Adjunto: 
