sorry that I don't have any experience to recount, but I'm in the same position as you. one thing I had though of was to replace the storage bin in the top of the dash with one of the flip-up bins they have ( see this link at Tregcentral.com ) and then possibly modifying it to hide the empeg in there.
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Rio Car 30gb
2000 Boxster S, <img src="/ubbthreads/images/graemlins/cool.gif" alt="" />