Some Doubts with Finishing my game-map

I made a really awesome game map . I am a beginner so I got a few doubts . I need to send the map to the game creator so that he can upload it on his game but I don't understand - 1)How should I send the map so that he can add the characters and default game players.He uses Cinema4d for making maps so he is also unaware of how to do it . 2)I downloaded very many assets but used few of them (I imported them to my project) . Example- I imported 30 trees and models but I used only 3 trees and 2 models . SO when I send my map to the creator of the game , will all the project files be sent to him or will the ones I have used be sent to him .