GTA IV savegame

    public class GTASave
    {
        public XboxClasses.IO.IO IO;

        public System.Int32 Unk;
        public GameVersion GameVersion = GameVersion.GrandTheftAutoIV;
        public System.Int32 Unk2;
        public System.Collections.Generic.List<System.Byte[]> Blocks = new System.Collections.Generic.List<System.Byte[]>();

        public GTASave(XboxClasses.IO.IO _IO) { IO = _IO; }

        public void Read()
        {
            IO.Open(0);
            Unk = IO.Reader.ReadInt32();
            GameVersion = (GameVersion)IO.Reader.ReadInt32();
            Unk2 = IO.Reader.ReadInt32();
            IO.Reader.ReadASCII(4);//"Save"
            Blocks.Clear();
            for (System.Int32 i = 0; i < 32; i++)
            {
                System.String BLOCK = IO.Reader.ReadASCII(5);//always = "BLOCK"
                System.Int32 BlockLength = IO.Reader.ReadInt32();
                Blocks.Add(IO.Reader.ReadBytes(BlockLength - 9));//9 be "BLOCK" + BlockLength
            }
        }
        public void Write()
        {
            IO.Open(0);
            IO.Writer.WriteInt32(Unk);
            IO.Writer.WriteInt32((System.Int32)GameVersion);
            IO.Writer.WriteInt32(Unk2);
            IO.Writer.WriteASCII("SAVE");
            for (System.Int32 i = 0; i < Blocks.Count; i++)
            {
                IO.Writer.WriteASCII("BLOCK");
                IO.Writer.WriteInt32(Blocks[i].Length + 9);
                IO.Writer.Write(Blocks[i]);
            }
            //CheckSum
            System.Int32 EndBlockPos = (System.Int32)IO.Writer.BaseStream.Position;
            System.UInt32 CheckSum = 0;
            IO.Writer.BaseStream.Position = 0;
            for (System.Int32 i = 0; i < EndBlockPos; i++)
            {
                CheckSum += IO.Reader.ReadByte();
            }
            IO.Writer.WriteUInt32(CheckSum);
            IO.Writer.WriteASCII("END");
            IO.Writer.WriteInt8(0);
            IO.Writer.Flush();
        }
    }
    public enum GameVersion : int
    {
        GrandTheftAutoIV = 707822,
        TheLostandDamned = 604730,
        TheBalladofGayTony = 622706,
    }