This video will show you how easy it is to setup a trite (spider-like monster), to slide down from a string from the ceiling. It's just to setup a premade animation for it.
http://www.mnemic.tk/education/videotut ... o_tscc.rar
the link is broken here above but by digging into the website itself i found the working link:
all of his video links are like that. but as you found out, they are still available to download, you just have to go to his site and find them.