Darn. Got here too late. Harold, would you mind reposting it in the plugins forum?
Edit: By the way, Rick, the icons I needed were 32x32 icons, which as far as I can tell, weren't supplied in png format.
The reason I ask is because I needed to use an image that is already in 32-bit bitmap form. The only way I can do this currently is to use the gimp to open it and save it as a png, then reopen it in paint.net.