>All the counters are also png files. I have no idea what colour depth 
>they have - didn't really think to look at it while making them (they 
>were mostly made years ago as BMPs in Paint and ADC, then converted). 
>Obviously the thought of going back and adjusting them is pretty 
>depressing, but if it's necessary then I'll do it. Presumably the way 
>to do this (using Gimp) is to switch the mode to Index and reduce the 
>number of colours, then save once more as a PNG?

Install Image-magick and create a batch script that for each file does

  convert old/file.bmp +dither -colors 256 -strip new/file.png

Try adding -raise 2x2 for a touch of spice.

Cheers,
Brent.
____________________________________________________________
Brent Easton                       
Analyst/Programmer                               
University of Western Sydney                                   
Email: [EMAIL PROTECTED]

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