In the section expert there is a formula box next to the supress (no drill down) check box. That takes a boolean ie If true supress hide, if not (false) show.
This supresses the section (no space taken up) for me. The only other item that is checked in the section expert is free form. Not sure if that has anything to do with it.
Also make sure your sections are tight on the fields you are not supressing. Crystal will show and oftern multiply the space left, possibily giving you the look not being supresses due to that column creating 2 inch’s of white space.
(Sorry in advance for the SP mistakes J )
Also sorry if this is no help. Im pretty new to crystal my self.
BB