There are plenty of guides on installing DSDT's, the general procedure is to put it in (your Chaemaleon partition)/Extra/DSDT.aml.
Use the one in this link (and the kext if you want audio, remember to use the needed kexts for the board, fakesmc, JmicronATA, etc): http://www.infinitemac.com/attachmen...0&d=1266286201