I managed to update providers for my N9, hopefully some of these can be used in your N900. Google blocked access to its tiles servers, so I replaced it with bing maps. Unfortunately I have no idea how to change search and routing engine, as both google and cloudmade services are unavailable and @dwaradzyn did not provide ini file for it.

link with instructions here: http://grec.co.nr/priv/cloudgps.zip