Need Major Help On Vocal Booth ASAP

I need help buildin an vocal booth. Im doin this for a tech ed project and instead of goin out a buy 1 mite aswell build 1 to save more money. I need some dimensions for a nice size 1 not big but prolly hold 2 people I need to know everything what to put on tha inside and outside.I was going to use these dimensions http://digital-synthologie.de/gesangska ... x.html.(if u know a better layout tell me and this is going in my room which is not that big but this will fit) But I dont know how to install all tha headphones and mic and all dat into tha soundbooth like it is in tha picture and how tha hook up tha lights. If ya can help reply to this thread