[GRASSLIST:5996] raster resolution

I have a question about creating contour lines from a raster file. I want to smooth the lines so they are not jagged - basically I have contour boxes. I am wondering how to run the program so that it interpolates the values instead of just putting the line along the grid lines.
Any ideas?

Schuyler Fishman
Schuylerfish@earthlink.net
www.mindlikesky.com