This script is an alternative to the optimize and the multires modifiers. Being a script it's a lot slower though. Keep in mind: save before use! This script cleans up a poly by removing edges where two polys meet below a certain pitch. Select the edges which you feel are not so important regarding your topology then apply the script. Wait. Write me if something goes wrong!
Notes and limitations:
-Something's not 100% with the vertex-removal
-Use undo if you encounter weird vertex-removal problems and solve the removal manually by unselecting.
Video tutorial: http://zoa3d.com/multires-a-maxscript-video-tutorial/