NipTuck

This :-)
My husband and I were married before he entered the U.S. on a VWP for a visit. Circumstances changed, so he adjusted his status.
As for a lawyer--I think it's a personal choice. When we first started the process, I was dead set on hiring a lawyer. All of the different possible options were really confusing and overwhelming. Once we figured out we were going to AOS, though, it was far more manageable. We used the guide here as a starting point. Look through the forms. Read through the instructions. And use these forums. I was able to find answers to every one of the questions I had on VJ threads.
It did take a lot of time and effort, but I felt very confident in our packet when we sent it off. I knew what was needed, and I knew what was in it, and that was a really comforting feeling for me.
Good luck!