Hey guys, I just hacked my exhaust to make it sound louder.
Details are at
http://www.ppbb.com/boards/ppbbphp/showflat.php?Cat=&Board=ARCHIVES&Number=1085350&page=4&view=collapsed&sb=5&o=2&fpart=all
It is possible!
It was pretty rough, but beats paying $1000+ for a sports exhaust, and looks completely original (from the outside).
I've attached (well tried to..) a pic of where i cut the hole to bypass the muffler chambers. (no thats not my exhaust, i din't have to open it as i cut it using the side of a drill bit up the inlet.