[jcus]

Jim,
My '99 has the pocket doors tied into the 12V air compressor.  Here is how they did it.  They ran a l/4" air line from a brass block off of the 12V air compressor after the regulator--therefore the pocket doors never get higher than 60 psi.  The air line left the 12V air compressor, went through the plumbing bay over the top of the waste tank to the left side of the coach.  The line then "T"d into the two pocket door lines--one for the front & one for the rear.  The schematic in this thread will give you a visual:  http://newellgurus.com/showthread.php?tid=2674

Here is a photo of the 12V air compressor:  

Thanks Steve, Got looking behind 12v compressor and found capped off 1/4 line. Took a chance and '"t" it into 12v compressor discharge before regulator. It worked! Gauge on dash reads about 60 psi [12 volt compressor pressure switch setting]. If I use the 110v compressor I get about 90 psi. 
Whole purpose of this was to allow me to use pocket door when dry camping without using generator to run 110v compressor.
On my coach 110v compressor is not on inverter..