I cant say I have seen any pics of a Euro owner who has installed Sat Nav. However these days there are many options for fitting Sat Nav. I have a IPAQ connected to a bluetooth GPS receiver which does my turn by turn Sat Nav for me. It is just stuck to the windscreen using a suction cup. The Navman PiN devices that Honda are selling for around $1000 (or less if you shop around) will do the same job.

Another option is to install a flip out screen in the dash outputting Sat Nav. Very pricy doing it this way though...