I think the reason Asacol, Colazol, etc provide protection from cancer because they keep the inflammation under control. The Remicade should do that as well. If the Remicade alone keeps you in remission, I'm not sure why you'd need the Colazol as well. But, I'm not the best person to answer that, since I'm not on Remicade.
You're still doing well, I take it?
Status: Remission since late May 2009!
Symptoms began in November 2008, ~4 weeks after giving birth to my son.
Diagnosed with pancolitis on 1/30/09
Currently taking Asacol (400mg 4 pills 3x daily), Rowasa twice weekly, Natural Factors Ultimate probiotic 12/12 Formula, and Zoloft (25 mg).