A Final Plan for Esteban

 is an unmarked quest in Fallout: New Vegas.

Quick walkthrough
Retrieve the corpse of the husband of NCR Private Christina Morales. His body is located to the east of REPCONN Headquarters. His corpse is used by Fiends to lure in NCR troops, so take them out first, then grab the corpse and carry it to the nearby NCR Troopers camped just North-West of where his corpse is found.

Detailed walkthrough
Heading south from Camp McCarran toward the map marker is one approach. Just north of the REPCONN Headquarters, the player will be approached by an NCR Trooper who offers some advice about retrieving the corpse. There are several options at this point:

Ranged Weapons
By far the easiest method. From the Trooper's position, a player handy with rifles should be able to snipe all of the Fiends off of the roof of the buildings surrounding the corpse (about 4 or 5 of them). A Sniper Rifle or Hunting Rifle should do the job well. The Plasma Rifle is accurate enough as well.

Explosives
Lobbing explosive ordnance onto the roofs of the buildings can kill two Fiends at once. Using V.A.T.S. is recommended so that the explosives detonate on contact, lest they roll off the roof and explode harmlessly on the ground.

Melee Weapons/Unarmed/Stealth
Players specializing in pure Unarmed/Melee Weapons will find a head-on approach difficult. There is no way to access the roofs of the buildings on foot. Without great accuracy with the Throwing Spear (Fallout: New Vegas) or Throwing Knife, this quest is frustrating. One way to solve this problem is the pacifist's approach. Activating a Stealth Boy (Fallout: New Vegas) will give the player enough time to sneak in, grab the body, and lug it out, all the while in Sneak Mode, completely undetected.

Tank
The Fiends don't really do a lot of damage to certain characters. A player with decent DR (Toughness works well), HP, and Sneak can disarm the mines on the way to the body by approaching from the side, get close enough to the body to grab it, and simply walk out, absorbing bullets and buckshot the entire time. Grenades are something to watch out for, but the Fiends' aim with the explosives is usually poor. If done right, Stimpaks aren't necessary.

Whatever the method of dealing with the Fiends is, the traps can be deadly. There are bear traps by the picnic tables and a rigged shotgun in a walkway between the two buildings, when approaching from the open end of the U-shaped building complex. Players who opted to kill all the Fiends have plenty of time to spare disarming the mines, but players sneaking in need to move quickly to avoid getting caught red-handed.

The player will need to carry the corpse back to the two NCR Troopers camped out just northwest of the site. After going to the west side of the building and taking the stairs down from there, they will be just ahead and will show up on the radar. Once the player has reached the goal, a new note will be added, and you can drop the corpse. The complete the quest, the player should then return to Pvt. Morales in the Camp McCarran Terminal Building concourse and inform her that the task has been completed.

After speaking with Pvt. Morales, she will thank the player and offer to assist you in anything you need, though this is just a polite gesture. There will be a reward of 50 caps if the player asked for a reward, although the karma reward will be forfeit.

Colonel Hsu will thank the player for their work after the quest is completed.

Bugs

 * The corpse of Ranger Morales will occasionally blink or get stuck in place.


 * Be sure that you talk to the NCR Troopers before you reach Ranger Morales' Corpse. Occasionally if you return the corpse before talking with the troopers, there is a chance they won't acknowledge you retrieving the corpse. Although, occasionally, leaving and returning to the corpse area (leaving the body there) can force one of the Troopers to appear to you and talk as if you hadn't attacked yet. At which point you can proceed normally.


 * Colonel Hsu doesn't always thank you for bringing the body back, after speaking to Pvt. Morales again.


 * If you pick up the corpse and fast travel, when you come back he will be suspended in the air, he may be stuck. You can hit the corpse with an unarmed fist get him unstuck.


 * Mines fail to appear around the corpse, while the Tripwire Shotgun and Beartraps are still in place.


 * Some NCR Troopers still say that no one has retrieved Ranger Morales' corpse even after the quest.


 * Sometimes Pvt. Christina Morales disappears from the McCarran Concourse Hall after you have started it and the quest no longer is in your pip-boy list. If you go to the body, there are no NCR Rangers around to take it to.
 * sometimes the body will disappear if you find it then mess around