hi Nick,
thank you very much for the help.
i have now upgraded to 5.6, everything went well 
does this operating system come with new presets? if not, could you please tell me how could i obtain & add the news ones in the system? any help would be most appreciated.
also, another quick question….the previous owner told me that the internal battery is due to be replaced and indeed every time i turn the unit on a note comes up saying that '' I sense that the internal memory is new, would you like to erase it ''Yes or No''.
So i was wondering exactly what type of battery i should get and if it is relatively easy to replace it myself or i need a specialist? Lastly, is it something quite important to address or not?
best wishes
alex
