Secret Photos puzzle

Secret Photos puzzle (XP0) is a file format associated with Secret Photos, an application that creates and plays scrambled-tile puzzles. It contains images and other data.

Format
An XP0 file apparently has two embedded JPEG files: one for the "secret" image, and one for other graphics used by the puzzle.

Software

 * Secret Photos
 * XnView

Sample files

 * secret.exe (Inno Setup self-extracting archive format) → *.xp0