// ARCHIVE HEADER
  4 - Header (VOL )
  4 - Hash?
  4 - Header (volh)
  4 - Unknown (128) (BIG)

// FILENAME DIRECTORY
  4 - Header (vols)
  4 - Filename Directory Length (including padding and the next field) (XOR byte 4 with 128)
  4 - Filename Directory Length (excluding padding)

  // for each file
    X - Filename
    1 - null Filename Terminator

  X - Unknown

// DETAILS DIRECTORY
  4 - Header (voli)
  4 - Details Directory Length (XOR byte 4 with 128)

  // for each file
    4 - Filename Offset (relative to the start of the first filename in the filename directory)
    4 - File Offset
    4 - Decompressed File Length?
    2 - Unknown

// FILE DATA
  // for each file
    4 - File Header
    4 - File Length (XOR byte 4 with 128)
    X - File Data
    0-3 - Padding to a multiple of 4? bytes?