Hi Corto, try Joe's new tutorial, it has some stuff with tracing images:

http://bitreality.blogspot.com/

Also check these messages for some other tutorials:

http://moi3d.com/forum/index.php?webtag=MOI&msg=510.2
http://moi3d.com/forum/index.php?webtag=MOI&msg=510.4

- Michael