unfortunately as Borde pointed out, we can use biturn to convert .p to 3ds and go from there but we can't convert it back to .p ... so maybe not yet. 'side, one should learn to do with the current hi-poly reunion patch ^o^.
that, and i'm also not sure about the poly limit of the ff7 engine... among other stuff. so 'til then, AC Cloud's gotta wait in the corner. or like others are trying to do, u can swap parts in and out (yuffie's leftie in with some changes) to fashion ur own AC Cloud :p