After the latest updates V 1.24, the Hellcats refuse to lock on to anything, the M134s and the DARs refuse to get the lock on cross-hairs. The Pawnee on the other hand, allows you to lock on to help you aim.
This in turn, is interfering with my retexture/rearm mod for the Hellcats since its missiles have been changed to the DAGR rockets.
http://www.armaholic.com/page.php?id=24161