.cca is MMF1 :PHmm.. It opens in TGF
.cca is MMF1 :PWoah, I was just about to post "I don't have the extension for Wadf! :O Anybody know where I can find them :("
Anyway, the extensions are attached :D
EDIT: If you have MMF2, you may be able to load it by putting these in your MMF1 extension folder, but you would not be able to do much else, as some extensions haven't been ported. :/ (remember, as Nifflas said, it only really works in MMF1.5)
You'll need MMF1, however, to run or build it.Bah. <_<