These posts make little sense to me.

The video shows drawing a line?

Apparently they relate to the posts here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=8665.4
and
http://moi3d.com/forum/index.php?webtag=MOI&msg=2267.2
?
And require editing of moi.ini file?
and also "uncheck project to plane in ortho views" in options snap?

- Brian