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
Just head south from Camp McCarran toward the map marker. Just north of the REPCONN Headquarters, you will be approached by an NCR Trooper who offers some advice about retrieving the corpse. From the Trooper's position, you 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). Afterward, approach from the west (toward the REPCONN Headquarters, the open end of the U-shaped building layout surrounding the corpse). Even though the Troopers warned of traps, there are bear traps by the picnic tables and a rigged shotgun in a walkway between the two buildings.

You will need to carry the corpse back to the two NCR Troopers camped out just North West of the site. You can find them easiest by going to the west side of the building and taking the stairs down from there, they will be just ahead of you and will show up on your radar. When you get close enough, a new note will be added, and you can drop the corpse. 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 you 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, though you'll lose the karma reward if this option is chosen.

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

Journal entries
(Unconfirmed - just copied previous text into table format.)

Warnings

 * An NPC (Non Playable Character) may accidentally detonate the mines around the corpse (for example a Traveler or a Fiend), blowing Private Morales to pieces and not allowing you to complete the quest.


 * If the player has discovered REPCONN Headquarters prior to taking this free quest, it is inadvisable that they fast travel to that location until after the ranger's corpse has been recovered and returned to the NCR, as doing so will likely place them in the center of the Fiend ambush with little to no time to prepare of combat or hide.

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.


 * When approaching the corpse from the southwest I encountered the NCR soldiers as hostile even though my karma rating with NCR is Idolized.


 * 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.


 * (XBOX360-confirmed) 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.


 * The two NCR troopers were Glitched together, so it would appear as only one was waiting for the corpse. yet you can make out two body when standing next to them.