Reading in "preview type" of an EPS file...

Hello all,
First let me say I am very much a newbie when it comes to scripting Photoshop, but I have a very general question with regards to preview types in Photoshop. I understand it’s possible to use options when saving to assign a specific preview type using constants (eight bit Mac OS, eight bit TIFF, etc)… but is it possible to read in that value in a script, like can be done with properties?

As far as I can see, it doesn’t appear that Photoshop allows you access to this information. I could see no difference in the “File Info” panels for the same image saved with and without a thumbnail.

My best guess for a solution would be to install ExifTool and use “do shell script” to have ExifTool get you the thumbnail information on an image.