No wonder you're mad! I too think that he's trying to mark the "new" territory, or it's stress related. I'm not sure whether it's a good idea to put something on the floor he either likes or dislikes, but I'm sure others here will know. If it's a raw? wooden floor, one thing you should do, is to wash it with ..... not sure what it's called in english, but it's the white soap flakes you whip up - people used it a lot 50 years ago. If you can get them, use a very thick solution, that will prevent the urine to soak down. He may not even like the smell of it - don't know if that's good or bad.

Someone mentioned lemon and winegar, but I think that was for preventing scratching wallpaper.

Concerning your carpet, I think it's a good idea to not let him in there the first few days. Let the usual smells of your house settle on it.

Sorry for the poor advise, I'm sure you'll get some good tips from others. Good luck!