I have an 05 CRD and I'm attempting to add the transmission skid plate myself. As I was attempting to remove the rear bolts from the engine skid plate I of course quickly found out they have inserts because they broke loose and are now spinning freely. I can't get the front bolts off yet but haven't tried real hard as I've read a few posts that they are prone to breaking off.
Couple of quick questions:
Will I need to remove the rear bolts completely to get the transmission plate on? Does the transmission plate get layered on top of the engine plate notches or below? Anyone have any good tricks for getting the front bolts off the engine skid plate? Any other hints or things I should be aware of?
Thanks in advance.

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2005 CRD Sport
Samco hoses, GDE Ecotune, Fumoto drain valve
Winter mods: air box snorkel removed, front grill covered, viscous fan and clutch removed

I'm sorry I don't know what to do about the spinning nutserts, but I can tell you the transmission skid slides under the engine skid. The reason is so that you won't snag on rocks that are sliding by (unless you wheel backwards!). Someone advised me to use anti-seize on my skid plate bolts so that they'd come out easier later on. Sorry that doesn't help your situation now, but it might help you in the future.

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2008 Liberty Sport 4x4 Automatic

Jeepin By Al 4" Lift Kit
BFG KO2’s 245/75R16
Full MOPAR skid plates
Rock Lizard Skink Super Sliders
AtTheHelm Front Recovery System & Roof Rack
M116A3 Trailer build thread: viewtopic.php?f=72&t=77997

If your nutserts (rivnuts) are spinning, tightening them down and hitting them with the impact in reverse will get them out.

If that doesn't work its angle grinder surgery.

x2 on the overlap the engine on top of trans. The front of the engine skid isn't nutserts so they should come out with a breaker bar.

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07 KJ Sport
OME 927-948 / Bilstein 916-702 / 0.25" JBA Plates / Rear Iso / JBA 4.5 UCA / Mamba MR-1 / 245 75 16 Duratracs / Mopar Skids / Curt Hitch

I had to grinder one of my bolts out on the front skid plate. However, when i later ordered in my transfer and transmission skids, it came with the nutserts, plus a nutsert insert tool, which actually had an extra nutsert on the tool itself. I was able to use that extra nutsert to fill the hole up to have something to bolt to. I'm sure after you grind it out, you could find an extra nutsert. Or just drill up through and bolt the whole thing up through the cross-member.

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Ironman HD springs, Bilsteins, MLL's, Mopar skids 245 75 16 Treadwright Claw's.