Standard Addon Procedure:
1. If addon is compressed (.zip, .rar, .ace type) then use WinRAR (If you don't have it, get it
here) to decompress it into a folder.
2. READ THE README!
3. Unless otherwise noted in the Readme, place all PBO files in OperationFlashpoint/Addons, OperationFlashpoint/Res/Addons, or in a seperate mod folder.
4. If you have downloaded an island, place all anim/anims folders in your OperationFlashpoint/Addons folder.
5. Start OFP, and play around with the new stuff in the mission editor.