Excel 2007 : Hiding rows through conditional formatting

I am trying to set up a conditional format for a group of rows in a scorecard depending on selection from a ComboBox(form control) wherein certain rows become hidden or displayed. The point values change as well depending on the selection.

So far, I have successfully managed changing formatting and point totals but can not find a way to hide them.

Could anyone give me any help with making this happen?

Thanks a lot!