Need a Catepillar script

[RPGJester]

Yeah see my avatar?  That is the script I want from that game.  Phantasy Star Style Party movement where the members follow each other in a line.  I haven't had time to scour these forums yet as I must be getting to class to work on this project and I just now stumbled upon them so if anyone could point me to a script for that, it would be great.  I have found a few but either don't understand them or they just don't work so preferably if you know of one with a good description on how it works and where to put it.  Thanks in advance as I am a newb when it comes to scripting in this program.

[modern algebra]

http://rmrk.net/index.php/topic,9869.0.html

[The Shadow]

Here's another one.

http://www.phylomortis.com/resource/script/scr007.html

[modern algebra]

same one, I think