SUBS,
I am not saying that you need to be behind the carrier to enter the freq. However, in order to see the needles, you need to be behind the boat (or at least the back half). I usually pick the needles shortly after I am in the "abeam" position on the downwind, prior to the 180. The navigation system on this bird, defaults to OFF when it doesn't receive a signal (i.e. out of the range for a VOR, TCN or out of ranges, glidepath, or azimuth for ILS). To my knowledge, the navigation system on this hornet displays the TCN freq. on the UFC, regardless on whether a VOR, VORTAC or TAC freq. was entered.
As far as operations go with the ILS on this Multiplayer Carrier Mission, all you should have to do is
-Select the ILS button on the UFC
-Enter 111.55 on the number pad and press ENT
-Select ILS on the HSI
Assuming that you have done all this and the file was installed correctly, all you should have to do is take off from KSFO, head toward the carrier and start a normal carrier approach. Once you are within range of the ILS system the nav radio should automatically detect the signal and switch from off to on and the needles should automatically pop up on your HUD. That should be all that is required to make it work.