Maxwell Smart

Hello !! i'm coming back to IL2 and DCG after a lot of years without playing ,so i know about modding but i'm stuck at this : i've installed IL2 Sturmovik 1946 4.12.2m+VPMODPACK so i downloaded two compressed files "Compatibility mod " 1 and 1b,how to apply them ?? i can't find a clear guide ,thanx in advance