public void WriteBlockCounts(uint TotalNumberToBeStored, ushort TotalNumberNotAllocated)
{
header.Seek(0x392L, SeekOrigin.Begin);
bw.WriteUint24(TotalNumberToBeStored);
header.Seek(0x395L, SeekOrigin.Begin);
bw.WriteUint16(TotalNumberNotAllocated);
}