HDR
entry 
{
  16B char[16] section name
  12B zero
  4B base offset
}

DAT
section 
{
  4B offset
  4B size
  xB file data, mod4 padded
  entry 
  {
    4B int: file offset
    4B int: file size, if directory then sum of all its file sizes
    4B int: 0xFFFFFFFF padding 
    2B int: type flag:
               %10000000 - folder
               %00000010 - file
               %00000000 - file
               %10000010 - subfolder?
    2B int: if directory then sum of all subentry sizes plus this entry size (subentry count * 32 + 32)
    16B char: filename (replace last "_" with "." if any)
  }  
}