Hi Alex, there are a couple of scripts similar to that:

http://moi3d.com/forum/index.php?webtag=MOI&msg=6925.200

http://moi3d.com/forum/index.php?webtag=MOI&msg=8226.8

http://moi3d.com/forum/index.php?webtag=MOI&msg=8230.5

Are any of those close to what you need?

- Michael