Thanks mark for the quick response.
For once I lucked out. The joist run the same way as the pipes so I do not have to cut into any of them. Will I be able to replace the existing 2' pipe where the shower currently is with a 3" and run it into the existing 3" where the toilet currently sits? Also will I be able to use this same 3" existing sewer pipe as the new drain for the shower or do I have to run and entirely new 2" pipe to the downstairs? I will get some pic's and post them next week for a follow up and allow you too see exactly what I have going on.
Thanks Again!