Thanks so much for replying.
Actually I do mean Child Post Types of other Post Types. I am not sure if this is a strange workaround implemented by the Toolset 'Types' plugin, or if it exists anyway, but I have certain Custom Post Types that are children of other entire CPT's. The reason for this (although it's a bit besides the point) is because within the child CTP, i create Custom FieldSETS and then, within the parent CPT page, i am able to create repeating custom FieldSETS (as the custom fieldSETS of the child CPT show within the edit screen of a new page of the parent.) Usually we can only creating repeating fields (as opposed to fieldsets).
Whew. Hope that made sense.
Anyway, i fear this means that the plugin doesn't work/affect the child CPT, so my master plan has crumbled :o
Let me know if you have any thoughts, and meanwhile i will take a look at the links you posted.