There was recently a thread that came up with a similar issue. Here it is:
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=88&t=85206Based on info in that thread, I don't know of a cheater method, but if there is one and you could find out and maker it work, I'm sure a lot of us would like to know. Do post back.
There are several other heater core and dash removal threads in the KK How-To's Index, which is in the KK Tech Section. Here's a short cut. Scroll down to 'Interior Mods' and 'Heating & Cooling'.
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=104&t=80240
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2008 Liberty Sport 4x4 Automatic
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AtTheHelm Front Recovery System & Roof RackM116A3 Trailer build thread: viewtopic.php?f=72&t=77997