im trying to update an old tt go 520 and have updated navcore to 9.510 , the map for this is in 2 parts , do i put them onto device in 2 separate folders or put them in one folder on pc , then transfer them to device as one folder ? Also what do i do with the me ta code ? do i just copy it from Russell ! post then put it in a folder and transfer it to the device ? i have tried to install latest me ta using various tools but when i try to activate the map ( maps , as i have put it in the two folders to start with ) , it wont actvate and says to check me ta . thanks for any help .