I created this script to speed up my daily work with crowd animation. If you have a lot of character studios rigged bipeds and need to load the same animation (walk loops, conversation...) on all of then, so this script might help you.
It's a .mzp file that you can just drag and drop into 3ds Max or run through the MAXscript menu. After that you will find the script at: Customize > Customize User Interface > Toolbars tab > Category: MMScripts > Load Multiples Bips".
To use the script you just need to: