private void WriteMainHeader(SaveIO.SaveWriter writer)
{
// Write the new header to a MemoryStream for resigning purposes
MemoryStream tempStream = new MemoryStream(HeaderSize - CRC32Size);
SaveIO.SaveWriter tempWriter = new SaveIO.SaveWriter(tempStream);
tempWriter.WriteUInt32(_unknown);
tempWriter.WriteInt32(_cfgSize);
tempWriter.WriteInt32(_dataBlock1Size);
tempWriter.WriteInt32(_dataBlock2Size);
tempWriter.WriteInt32(_saveDataSize);
// Grab its CRC32
CRC32 crc32 = new CRC32();
byte[] checksum = crc32.ComputeHash(tempStream.GetBuffer());
// Now write it to the destination stream
writer.WriteBlock(checksum);
writer.WriteBlock(tempStream.GetBuffer());
tempWriter.Close();
}