I'm back from my India vacation (which was awesome, BTW - maybe I'll post some photos later if I get motivated) and I'm returning with a bang - here is a confirmed working method to do the missile glitch and is works as of April...
adas anti-synthetic rifle
Well, two items of good news - my Xbox LIVE connection came back to life yesterday! So, now I can triumphantly return to ME3 and game with you guys :).