The name of the file is ABEFACE_8291.jpg
This is a strange file name, the hand and chest files were respectively called handfull.jpg and chestfull.jpg.
Could the 8291 be releavant to the ARG? No luck by putting it in the dialog box, only getting generic responses.
EDIT: for some reason ABEFACE_fullres.jpg exists too
EDIT2: Discussion about Abe's new look should go in this thread:
http://www.oddworldforums.net/showthread.php?t=22273