Pocket PC Theme
A Pocket PC Theme file (.tsk) contains a theme (wallpaper images, etc.) for certain Pocket PC (mobile Windows) operating systems. It is apparently in the form of a CAB file containing files in common image formats (e.g. JPEG, GIF), among other types of files.
- 7zip. Duh
- XnView can extract the graphics. [Ed. note: Seems glitchy, as of v2.43.]
- You can probably use a general-purpose CAB extractor, and if necessary rename the extracted files to have their usual extensions.