Anyone know how to use a Navman N60i?

[NafemanNathan]

Anyone got one and fluent in using it? I've just acquired one, but when putting in a destination using a postcode, there is then no prompt to enter a house number... It just picks one at random and I can't even change it afterwards.

Now the manual and various other reviews suggest there is a straight forward way to do what I want as you'd expect, but I just can't see it

I can opt to enter a street and then it prompts me for a house number, but this is a it backwards if I only have a postcode and house number.