I am working on my next mission and as such I am starting to use UncleTgt's scenery packs. I was a little relunctant/afraid of using them as for example Maskrider and Xavierb sceneries are more of "additions" instead of "reworking/replacements" as UncleTgt's ones are (and was scared of my system perfomances dropping with those sceneries). But I finally took the plunge with the Caroline Islands JBr UT pack and with a quick look at Yap for example it is truly beautiful. I managed to make the default Yap airfield disappear completely with the right hierarchy in the scenery library. But here are my questions: are the default airfields mandatory for CFS2 to run? I was thinking of installing quite a number of UncleTgt's scenery packs and upgrade Rabaul for example. Can I get rid of the default Lakunai, Rapopo, Lae, Port Moresby etc and replace them with Uncle's airfields? Maybe make changes in the airbases.dat ? If I have a mission/campaign that is using default airfields I just have to change some things in the mis. file, right?