survival analysis question

[Phguardiol@aol.com]

Dear S+ users,

I have survival estimates for 2 groups according to a factorial covariate (covar=1 or 2) and I d like to only plot the difference in term of survival between these 2 groups over time with 95%CI. Could someone send me a short script (preference for S+2000 pro under windows) to do that since I m not an old S+ programmer ?

thanks

Philippe