PictureFlow will load up any image files that are in the same directory as the exe. Supported image formats:JPEG, PNG, BMP, XBM, XPM and PNM.

Changes:

1)Full screen pictures don’t look like crap anymore when you full screen them.
2)Aspect-Ratio problems FIXED! So your pictures of all resolutions should look good.
3)Appleton’s graphics have been added, so PF looks a lot better than before.
4)All graphics are loaded up dynamically, and can be found in the gfx folder. So you can make whatever changes you’d like to them. Advanced skin support will come later. But for now, you can change the buttons to whatever you’d like, once they’ve got the same size . Artists, go crazy!

http://forum.xda-developers.com/showthread.php?t=358049