Thanks! I've put together some C source based on your comments. This program will take a grayscale .png file and convert it to 4bpp. The cutoff values are user-configurable. Included in the comments is a bash script that will take one (or two) png files, convert them, and upload them to the unit.

Now here is a nice old thread! Does anyone have the source for the program linked here (link is broken)? Or is the author still floating around? I want to upload a boot logo to my empeg, but I have to convert it first I guess. Anyway I tried to install Tony's logoeditor on one of my companies test machines (I don't do windows personally) and it wanted some MS DLL. I am not willing to go through DLL hell just to install a logo. Is there any other way to convert a file to the format the empeg wants?

Thanks,
-Mike