Drop the 'RNZAF-Desert' Folder included in this 'RAR' compressed file into your DCS installation \CoreMods\aircraft\F14\Liveries\f-14b folder. This will not replace any other files or folders.

To uninstall, simply go to your DCS installation \CoreMods\aircraft\F14\Liveries\f-14b folder and delete the folder called 'RNZAF-Desert'.