To install the add on skin pack is all that you have to do is run the exe? How can you tell if it's installed? Thanks

Check the skins folder before and after install, if you want.
You find it here:

OBDWW1 Over Flanders Fields > campaigns > CampaignData > skins

Pick a squadron that you know has an assortment of aces... choose April 1917

France: Esc 3, 103
Britian: 56 RFC
Germany: Jasta 5, 11, 10, 12, or 13

You should see a good amount ace skins from any of those during that time period.

I took this shot today for the screenshot section, but here is what you can expect... my personal momunt is the double axes, so that doesn't count. But you can see other Fokker D.VII's lined up next to me are all aces with properly assigned skins.

And click on the skins folder...if it says 6000+ files then it has installed correctly. If it says 1500+ files then it did not.

It did! Thanks!