In the Salamun District of Killzone 2 for PS3, make sure to blast the box above the electric currents and then travel through the sewer pipe. Check on the on the wall across from you as you exit the sewer pipe and there will be a Helghan symbol on the wall for you to blast. Care and stealth must be used to best effect when infiltrating the enemy base. Keep your focus on the task and weight under its center when you're in the rafters because falling would be embarrassing and final. In addition, when making your way at ground level keep your eyes out for traps set using red lasers (which you need infrared to see).
Keep your eyes peeled for the VC1 Flamethrower hanging on the gun rack as you ascend the stairs, a fun, useful, engaging, and highly satisfying experience for the senses. When using this flamethrower the flame has enough weight that it will shoot out in an arc. For distant objects, make your horizontal angle greater.
Use tactics and strategy to ambush the enemy and eliminate the Helghan located by the artillery pieces when you're in the Dushan Loading Bay. Once you have done this you will set the D-charge as before (by aligning the red lights). You will need to destroy both artillery units before the convoy can proceed.
You will encounter a drop ship occupied by higher quality troops that will infiltrate the Shanties that you need to deal with. The second wave includes two enemies with rocket launchers that need to be eliminated before they cause you problems. Eliminate all the enemy soldiers in this area and then Garza will help you make it up to the ledge.
Keep your eyes peeled for more of those nasty traps set with red lasers as you make your way through the sewer, they can really shorten your day. The best way to deal with these traps isn't to shoot them. Instead throw a grenade and then you can move back and stay out of the lasts way. If you like the flamethrowers then keep on the look out for another one just before you move through the next set of traps and into the battlefield. Take the machine gun in your hands when you make it here and take out the enemy on the other side the barbed wire to give the convoy a helping explosion. You will then be asked by Garza to set a D-charge to open the door.
Once you guys have made it into the substation, Garza will need you to set 4 D-charges to take out the main pillars on the second floor. Expect Helghan resistance to be fierce as your trying to accomplish this, but Garza should be able to hold them off. Just don't set the explosives off until you exit the building. Continue with this Killzone walkthrough on the next page.