I think that what you are looking for is in here:

http://moi3d.com/forum/messages.php?webtag=MOI&msg=3830.1

the topic is "add elements to an object", but there is an "Assignpressetname" plugin on the 8th post

and for mac:
http://moi3d.com/forum/index.php?webtag=MOI&msg=3830.59

Hope this help

Luis G.