HOW TO DOWNLOAD .PACKAGE FILES
Example: Markings, poses, etc.
The first think you will need to do (unless you have it already) is download a .package file, you can use this one to start off with:
This is a full-body horse marking. In-game, you will be able to find it in:
Create A Sim > Horse > Coat > Advanced Mode
Once you have made "Mods" go into that folder and make another one and call it "packages", like this:
The go ahead and download this, and place it in the mods folder (not in the packages folder).