I used a heat gun and scraped all mine out...took a weekend <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/sad.gif" border="0" valign="absmiddle" alt=':('>
But after I finished I found that dry ice works too. Freeze the shit out of it and break it out in large frozen chunks.
You may still have to use the heat and scrape method for the rear seat back area unless you can figure out how to make dry ice stay on a nearly vertical piece of metal.
Getting it all out from the floors and rear seat area is good for about 15-20lbs.
Good luck <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/thumbs-up.gif" border="0" valign="absmiddle" alt=':thumbsup:'>
Here's mine...
http://www.steamymirror.com/dsc240sx/howtoupgrade/howtopics/weight/interior4.jpg