PNG for PTF is a small GUI I made that uses the DOS program Pngnq to convert 24-bit PNGs into 256 color 8-bit PNGs.
Why is this important? It's because Sony's Custom Theme Converter is very picky about what PNGs you can use to make PTF themes. There's very few image editing programs out there that support 256 color PNGs with an alpha layer, so that's where PNGforPTF comes in.
Also included in the zip is a tutorial on how to make icons with Gimp (a free image editing program) to help get you started.
Get it here: