I'm sorry to bother u again... I think I'm doing wrong wiht the script. Here's wat I did to install the mel script. I saved shelf_hair.mel script on <C:\Documents and Settings\Administrator\My Documents\maya> (I'm using win2k) Start Maya 4.5, go Window -> General Editors... -> Script Editor... After opened up the Script Editor, I opened the mel script, highlight all the lines, and use middle button and draged it into the Custom shelf on top. Is this the way script works?