John,
I'd be happy to help guide you through it, come on down to "The Palms RV Park" (
http://www.thepalmsrvpark.com/) in Aransas Pass, Tx. We're planning to make this our home base.
edt
Not sure what you want to know about the rollers, ours do not pass over any of the floor vents. Check again and you may be looking at the fixed rollers mounted to the floor, not the ones mounted on the bottom of the slide. Check by moving the slide in to the vent and look with a light to see if it will actually roll over the vent. Not sure what year yours is, ours is an 05 and they may have changed the location.
Keith