ALA 14, part of Spain's Ejército del Aire, flew the Mirage F1 from 1975 to 2013. As the F1 does not yet exist in game, I've made this skinpack of three Mirage 2000s (one standard low vis, and one each with a high vis tail for 141 sqn and 142 sqn) instead.

Unzip the contained folder and drop the three .zips within into CoreMods\aircraft\M-2000C\Liveries\M-2000C. You can delete the 141 sqn or 142 sqn liveries if you so wish, but if you delete the default gray one, it breaks the numbers and pilot on the other two, so... don't do that.