Bubba
I have the same thing as you and I the only advice I can give you about the diet is, If you can eat it then do it. I was a level four and had the right kidney removed and a gland and lymph node in my neck removed small spots in the stomach lining and one in the lung. I spent 18 months on sutent and believe it saved my life. CT and MIR's are clean and I'm going in for a Pet scan this month. If it comes back good I'm clean for the now. Sutent is the hardest drug I've ever had to deal with but my doctor insisted I stay on the drug. I went off the drug in mid June this year when my body was in such bad shape I had to go into the hospital for a week. I went from 228lbs when I had my first surgery (12/07) to 160 when I went in the hospital this June. I hated taking Sutent because I knew every time I started it I knew what I would feel like in two weeks. This drug saved my life and I've never regretted taking it, It SAVED MY LIFE.
Hang in there and eat whatever you can, and good luck.