If you're looking for Containement Frame (the portal to get to the new GT++ Dimension) in NEI, you'll come to the conclusion that it is not craftable.
ID is 3046. However these are craftable under the MetaData 3046:2.
Oh maybe I wrote it the wrong way.
It IS craftable. I made it. And the dimension is successfully activated.
It's just that the recipe in NEI does not show up under the right item ID.
If you look at the usage for the Field Generator (Tier II) you'll see it.