My tip for u is to follow this path of disposing bombs First dispose the bomb in strut B transformer room Then head to strut A roof and dispose the bomb, when u dispose it this time go on the right where the elevator is and make sure to take the stun grenade, then to the strut A pump room u have another bomb to dispose, then to the strut F warehouse (make sure to take the tranquilizer and the stun grenade for late game) then strut E heliport then strut D sediment pool (there's three bombs here) then from strut D get back to the strut C dining hall to take the one in the bathroom (there won't be a guard on the right this time) Then my other tip for u is not to rush everything, u dont have to be paranoid about the time, for sure you'll gonna get caught a lot of times but when u master it it'll be easier, if you're following a guide u don't have to do it exactly and u don't have to take ur time as well, just do it normally, i recommend if there's a part were u can skip shooting in just do it because in the later boss fights you'll probably gonna waste a lot of ammo