What's the largest number of line feeds that you need? You may be able to simulate this in a much easier way by creating a bunch of detail sections (assuming you need this at the detail level) after the section where you need your line feeds. For each section put something like this in the suppress formula:
{data field} < X
Where X is 1 for the first section, 2 for the section, etc.
This probably won't work if you need lots of line feeds, but it might serve your needs.
-Dell