Oh, I think you got me wrong.
You CAN ILS to the carrier. But, when I say this, what I mean is that you will get the ILS cross hairs in your HUD while you make an approach to the carrier (Default or Javier). You will also get DME information. With all this information available, you can manually fly the aeroplane to the deck (as in, YOU control the speed, descent, AoA, attitude etc).
However, you will not be able to 'Couple' (using CPL mode) this TCN/ILS info to the autopilot of hornet and make automatic approaches.
If you have already seen youtube videos of people using 'New Realistic HUD' to make automatic carrier traps, that would really be news to me. The only way (I haven't done it, so I won't be sure) anyone could CPL the carrier ILS to autopilot would be, if you use a scenery carrier (static carrier). But, not on AICarriers boats.
There are other specialists on this forum (Orion, Neutrino, FSXNP, Sludge, Razgriz to name a few), who would probably provide you with more information. I am only telling you what I know about how the new HUD works. I may of-course be incorrect.
It's Christmas, so people are probably busy with their real lives. Just hang on, and someone more authoritative on this subject will provide you a clearer picture on the subject.