okay...how is the set of lines to be suppressed determined? is it the end user who decides or some type of formula?
if it's the end user that's quick and easy...create a new parameter "Lines" that allows multiple values then change the suppression formula to
whileprintingrecords;
{@lineNum} in {?Lines}
if there's another criteria for the suppression, there's always a way to do this...just let us know what the criteria is.
-jamie