After numerous hours reading this forum I'm still fairly lost.

We're trying to finish the basement. The contractor had the basement stubbed out for a bathroom, but it seems difficult to figure out how the bathroom was laid out and there are no plans for it.

I've drawn up a picture of what we want to do, along with what is already present. I need to know what else I need to do to get our project underway. I'm not afraid to cut/break the slab, but at the same time, don't want to do so not knowning exactly what it is that I'm trying to do (DAP's, traps, etc. in other words, what needs to go where).

Here are a few pictures of what I'm working with/on:
http://i61.photobucket.com/albums/h6...9/DSC01063.jpg
http://i61.photobucket.com/albums/h6...9/DSC01075.jpg
http://i61.photobucket.com/albums/h6...9/DSC01074.jpg
http://i61.photobucket.com/albums/h6...thplumbing.jpg

I figured a project like this would easily exceed my plumbing budget of about $1200, so I'm going to attempt to take it on myself. Any help is greatly appreciated.

Can I guess? I'm sure someone will figure it out. My reasoning:

The Pit is for a shower and a trap.
The largest pipe is for a toilet which has an integral trap.
The small one left over is for a lavatory. You have to add a trap.

Now, see if you can put those pieces on a floor plan.

After I took these pictures, I had a real good idea about the way the builder saw the bathroom in the floorplan, however, it's not really how we're seeing it laid out, so we want to do it as the drawing shows.

I have a different take then Kiss on the dap-out. We don't dap-out for showers. This is a dap out for a bathtub. The rest is correct. First, what is that abortion that I see in the background with a cleanout and all those twists,turns and doglegs? If you wish to change the layout better rent a jackhammer and redirect the drainage. The 4" will extend over and pick up the toilet. You will first have to fill and cenemt the dap-out. The shower will have to roll up a wye or combo on a 45 after the trap to take a vent off from and the lavatory will connect into the drain line with a combo and run a vent up in the wall. The shower vent may revent back to the lavatory vent and they may revent back again to a existing roof vent up in the attic. Good luck, Tom

That "abortion" is the drainage for the rest of the house. Quality plumbing in my opinion... and I know almost nothing of the topic.

I'd like to relocate it, as it's currently hindering any decent finish of that wall at the moment, but I was worried about busting the slab that close to the edge of the house (that's the front of the house on the other side of that pipe.)

I think that if I do this project myself, it may only cost me a few hundred dollars, not including tool rental. The only problem is that I'm truly a novice when it comes to this topic. I guessing that all the pipes end up connecting together at some point. The vent pipe has me fairly perplexed at the moment though. I do have concerns about how much this will cost though, because I am on a fairly limited budget.

I guess one of my major concerns is voiding my home warranty by cutting on the slab.
What are some of the risks of cutting that much concrete out of the slab (a 10'x9' section) to replumb it all?

Thanks for your help