I have a house with two separate full bathrooms sharing one wall. This wall houses the supply and drain/vent lines. Only one bathroom is functional, but it is finished out nicely. The other is literally non-existent.

The previous owner, while very good at tile work, was terrible at about everything else (just imagine). The result is a 2nd bathroom with an appx 2ft x 4ft breakout in the slab. I need to move the now-accessible toilet and shower drains (I have no idea what he was thinking when he moved the originals). A fair amount of PVC is directly under the shared wall.

Photos:
2nd bath - a set on Flickr (http://www.flickr.com/photos/7870351@N04/sets/72157623113630083/)

From photo #2 you can see the crucial 6-way pvc fitting (3x3x3x3x2x2). The left outlet from the photo serves the sink in the finished bath. The 3" outlet that is hidden serves the finished toilet. The right outlet serves both shower drains... and the facing 3" outlet the toilet in photo #1.

I need to swap the toilet and shower drains from photo #1.

Any thoughts on the best configuration?? I understand I cannot tie in the new shower drain to the toilet drain before the toilet vent. Am I going to be stuck digging deeper to add another waste tee??

Thanks.