WTF are you saying? There's a small fraction of us that drive Hondas, so it's doubtful that most of us know about an '00-'05 Civic, other than being able to pinpoint one when we see it on the street.
And yes, you can put the radio in the lower DIN space. Why would you think you couldn't? That's the same plan I have in my Toyota, because I'd rather have the screen cover up the HVAC controls than the stereo when it's open.