Hi Smoluck, that's a bug in the node editor where Macros are not working with MoI version 3.

It can be fixed with an edit as described here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=7777.1494

I think the latest set of nodes can be found here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=9358.10

- Michael