Ok this part in the first misson in the campaign mode has been kicking my arse since i got it i've been trying to do a certain challange in paez misson,is there anyway to keep him from getting shot? and 2nd which way would I go about eliminating the gurds at his hq where you have to inflitrate i can only get 3 one behind bushes other in guard tower and one standing idle cant get the other 5 standing on ground what should I do? cause cant use sync shot at all.grr only for that i think id have no problem getting that challange.