I am a Hybrid Honda Accord owner and I am a, oh wait that is for the AA, LOL, I just joined the Hybrid ranks so I now have a Hybrid Accord and a Dodge Diesel Ram that gets over 20 MPG when driven in a reasonable manner.

I just bought a 2006 Accord Hybrid without navigation, it was the only one the dealer had on the lot.

If I wanted to upgrade to the factory navigation radio are all the plug in and harness wires already there and would the GPS antenna already be in the car or would this be a major under taking?

I would like to get the Honda navigation radio but don't want to get involved in a major project to do it.

Also why does the Hybrid Accord have antenna that sticks up (for GPS?) and the non Hybrid Accord has the Flat antenna?