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Batch color palette in png files

Can any body help with this...

I have a few hundred png files that make up an ordinance survey map. I want to set these to all have the same 14 colour pallet (to save huge amounts of space). I've had great success with individual files but now want to batch process to compress the lot.

I just can't get my head around the batch language in Gimp but I've already made the optimised pallet.

Hope you can help?

Forums: 

http://registry.gimp.org/node/25295

It takes all the images as layers and saves them with a specified palette.

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