I am pulling up my carpet to lay down laminate flooring. While doing this I plan on painting all of my trim white. The trim that I currently have is the cheap MDF crap with grain imprinted on it. I know I will have to prime the trim before painting it and I was wondering if any of you have every taped and masked off the floor and walls and used a power sprayer to paint your trim while it was still nailed to the wall? I don't mind pulling all of the trim off but since I am doing the whole house (first and second floor) as well as the jambs, I though it would be easier to just paint it while on the wall. Also, should I paint the jambs and purchase just the doors or would it be better to purchase pre-hung doors? Thanks.