How can u convert vp6 files to sdf files?

i cant view in game godfather movies (.vp6 .fsb and .fsx movie files) in the godfather game. this is because i have windows vista and there are compatibility issues. but game movies like hitman blood money with movies with .bik at the end of file names and movies in the matrix game with .sdf file names seem to work fine with vista. so im wondering if i convert the .vp6 .fsx and .fsb files to bik. or sdf. the movies might work. Can anyone help please?