This tutorial explains the pipeline to convert a character animation from 3dsmax, maya or motion builder (via the FBX file format) to UC-Win/Road.
3DStudio Max is used as a middleware to convert the FBX to MD3 (which UC uses). The downloadable zip includes the full size 720p mp4 video tutorial as well as the md3 exporter beta.ms max script (written by Yoshihiro Kobayashi) which automates this task inside 3DSmax.
The direct download link for the HD video is here
To download only the .ms maxscript file, click here
The video is also available on youtube: