When after downloading the mod you have to unzip it then click on the exe set up and it will ask you wher do you want to put it. all you need to do is copy and past it so it can go in the right place.
even the med patch and the map pack and the update will go in the same place.
Put this down in the browser widows xp user's :
C:\Program Files\NovaLogic\Delta Force JO
Put this down in the browser windows 7 user's :
C:\Program Files (x86)\NovaLogic\Delta Force JO
i hope this info can help a lot.
