Navman iCN 320 GPS Receiver "change softwer" Questions

...change the softwer to use other tipes of maps?Or there is an easier way to solve my problem? I have not dealt with the ICN320 but as like with most navman gps systems the only sure way to map change ...

...IT IS BEST TO KEEP THE DEVICE IN A PURSE OR ON A TABLE WHERE IT IS NOT SUBJECT TO CONSTANT TEMP. CHANGE 7. PREVENTION OF ELECTROMAGNETIC INTERFERENCE IS BEST SOLVED BY: interference from devices ...