Hi, and welcome to the forum,
Line spacing should not be an obstacle.
The navigation pane is not set in stone. Yes, RH applies a
default setup and offers a limited range of customization. But you
can get at most of the specs for the TOC, index and search results
without much trouble, and adjust the type size and line spacing.
Check out Rick's Skinny on Skins here:
http://www.robowizard.com/RoboWizard/NewProject.htm#Downloads/Skinny_on_Skins.htm
If you need more info, please post back.
Harvey