Apps ran THRU manila to show on TF3D tabs...

[dgourd]

As you said, it is more difficult than just skiinning the app. What you said was editing the actual tabs. That would need a chef. However, as has already been done, you can create a new tab to add to manilla. Not sure how its done, but some put Titanium as a tab in manila. To actually edit the files would need you to flash a new ROM.

In short you can either get a new ROM, or someone can create a new tab with what you want.