I don’t need to mess with skins, but I think the resource you should be consulting is Rick’s “Skinny on Skins” - http://www.robowizard.com/RoboWizard/Downloads/Skinny_on_Skins.htm
Hi there
The skinny file simply offers a multitude of ways to manipulate the skin and different WebHelp elements.
What I'm seeing here is that ktbFL is expecting to see the Previous and Next buttons but they aren't appearing. And this would happen if you do not have a Browse Sequence defined as well as enabled in the output recipe.
First step is to click Tools > Browse Sequence Editor and ensure you define a sequence. Second step (after confirming a sequence exists) is to ensure it's been enabled in the output. And if memory serves, you have to check two places. First, in the SSL recipe, expand the Content Categories item, then click the default (or category of choice) category. Make sure the sequence is enabled there.
Next, click the Navigation section on the left and ensure "Enable Browse Sequence" is selected on the right.
Once you have done this, the buttons should be there after you generate output again.
Cheers... Rick 