[LarzI]

The specs you want, are very hard and requires alot of work. May not even be possible.
The "easy version" of this, is probably something like this:

pawn Код:

if( !strcmp( cmdtext, "/mboat", true )) //morphing into boat
{
    new 
        Float:x[ 2 ],
        Float:y[ 2 ],
        Float:z[ 2 ],
        Float:a;
    new id = GetPlayerVehicleID( playerid );
    GetVehicleVelocity( id, x[ 0 ], y[ 0 ], z[ 0 ] );
    GetVehiclePos( id, x[ 1 ], y[ 1 ], z[ 1 ] );
    GetVehicleZAngle( id, a );
    RemovePlayerFromVehicle( playerid );
    DestroyVehicle( id );
    new morphed = CreateVehicle( boatmodel, x[ 1 ], y[ 1 ], z[ 1 ], a, -1, -1, -1 );
    PutPlayerInVehicle( playerid, morphed );
    SetVehicleVelocity( morphed, x[ 0 ], y[ 0 ], z[ 0 ] );
    return true;
}

I think that will work x3 I just made something up, so don't be surprised if it doesn't work :P