Here's a few links that may help:

Non-articluated Butt Monkey
http://www.theanglersnet.com/Fly-Tyi...tion=6&VID=142
http://buckeyeflyfishers.com/flyofmo...uttMonkey.html

Articulated Sculpzilla and Sex Dungeon
http://www.charliesflyboxinc.com/fly...m?parentID=151
http://www.charliesflyboxinc.com/fly...m?parentID=153

Miscellaneous
http://www.washingtonflyfishing.com/...ad.php?t=37891
http://www.itinerantangler.com/cgi-b...num=1233548701


Sorry no instructions for the Articulated Butt Monkey, but I'm sure you could adopt some of these techniques to get the results you want.

Regards,
Scott