how to upgrade the NAV600 to a NAV900.

[tucpal]

i will add the links later on to the above post but the one i have will change both day and night
to red and blue they work really well baz you will be very happy
he has other links in there but you really should ask him what they are
as he has done several attempts at this and improved it every time
the one i have used is his current and final update and the one he suggests you use
you can even do it yourself and rewrite the ULI codes if you are brave
but i would not attempt it as any mistake can lead to total failure
but this works perfectly well i will get it done soon.