Replying to "Half Pipe" Hip Idea's-Please Help

ALright, the 'half pipe' as they call it at our hill sucks and is beyond repair, but the walls are steep enough to make good landings. So what me and my friends want to do is build a jump on top of the outer wall of the so called pipe and us the inside wall of the pipe as a landing for a hip. We also want to have the alternative to hit the jump straight to slide some sort of rail or box if possible. Does anyone have any better idea's or possible sketches they can post that would help me out to generate an idea we use to build this type of setup
any help would be great
thanks
-B
Skiing isn't an escape from life, its simply a better form of it-Matt Levinthal-AXIS