Hello Alex,
ScaleUVW maybe the node that You searching for.
Here is a link for the latest extensions:

http://moi3d.com/forum/index.php?webtag=MOI&msg=8628.1

Take the extensions.zip - uncompress - and copy to ui/nodes- Restart MoI.

Also a sample for with the scaleuvw node.

Have a nice day
Karsten