A couple links for you:
http://archives.mycotopia.net/discus...tml?1093201399
lots of talk and links in this section
http://forums.mycotopia.net/showthread.php?t=13389 (A cold extraction for Soliver [also DMSO test])
Another topic on cold extraction.
Hope those helped. Also, you can use the search function to maybe turn up some more info.