I can definitely relate to the sitting driving you nuts. I definitely went through that last year when I couldn't stand or walk at all. I couldn't drive...I felt trapped. Just be honest with your doctor about everything. Even if the IME doc says you can work, that doesn't mean your treating doctor will. This is where a good lawyer will be important.

Also...have you considered (or do you have) a handicap parking placard? It might be a good idea. I waited a long time before getting one because I was so worried that I would be taking a handicap parking place from someone who REALLY needed it...but then I realized that I REALLY needed it. I figure that if I am having a better day or reach the point where I don't need then I just won't use it. Doesn't really help with the DRIVING itself but it can make parking less of a hassle...and every little bit helps. I don't know what the laws are in your state but I know in Illinois you don't have to worry about meters or time limits on parking spaces if you have the placard. It would be worth looking into if you don't already have one.