Hitman: Blood Money

During Mission 2, A Vintage Year, you are tasked with eliminating two targets - Manuel Delgado and Don Fernando Delgado.

Manuel Delgado is the target this achievement will be obtained on.

First off you will need a disguise. Use the sedative on one of the patrolling guards and steal his costume. Manuel will be located in the wine cellar. At the top of the wine cellar, there is a lone guard stood next to a 'Plant Bomb' location. When the guard leaves his post, plant the bomb.

Soon after, Manuel will appear below the planted bomb at the bottom of the stairs. Simply detonate the bomb and a platform will fall and crush him.

Note: This achievement won't pop until the end of the mission.

Attached is a video walkthrough for the mission. All credit goes towards the video uploader, srfgaming.

Please comment if you vote negatively. I will edit my solution to make it better.

If you're going for a Silent Assassin rating, in the same mission "A Vintage Year" you can also kill by "accident" Don Fernando Delgado (he is located in the last floor of the hacienda, you will need a VIP guard suit to access this floor).

When he stops playing music, he goes in the larger central room near his own bedroom and stands on the balcony for a moment.
You just have to push him over the rail.
Note that the guard in this same room is sleeping.