2 tone truck paint questions

[srea76]

Hi guys I have a few questions my painter wanted to know. I will be painting my truck similar to the one below. My painter called me today and wondered if the white in the middle went into the door jams. He also was curious if the roof inside was white originally. I told him even if it was I wanted it all red inside, but was not sure what to say about the jams. Also one more thing was is there a measuring spot etc and where to start the white on bottom and stop it on top? Thanks so much for anyone help and pics would be nice.