FM's have been completely redone, and are MUCH improved. There's even a flyable Gotha GIV bomber. They are working on making the Zeppelin flyable as well,(ai only right now but you can man gun positions). Check it out http://www.totalsims.com/The plane list includes..
Albatross DVa
Nieuport 17
Spad VII
Fokker Dr1
Sopwith Camel
Spad XIII
Fokker DVII
Bristol F2b
Halberstadt CLII
Gotha GIV
Handly Page (substitute)