I've tweeked about two dozen channel icons so far.
What i'm doing is re-creating every icon in adobe illustratior (vector art - which is resolution independent) and adjusting the size to whatever I want and there is not as much pixelization or distortion when the icon is converted to bmp. I think this is the best way to get a pristine image on such a small scale. I'm curious to see what they look like when imported into pronto edit. if anyone wants some icons, let me know.