Temporary YKZ fix

Thanks to an e-mail I received a few minutes ago I've been able to track down the source of that nasty missing file error. The Taxiway signs for the west side of 15-33 seem to have been left out of the pod process. To fix it just name any texture NYKZ0609.raw and make a second copy named DYKZ0609.raw. Now that I'm putting more time into Fly2 again I'm trying to get a new version out, hopefully it wont have the same issues the second time around :). A very large thanks to whoever it was that found the fix.