So you are mainly asking for a batch mode

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I've planned a batch mode, but first i want to solve a quality issue with the resample of images (java2d is pretty bad when enlarging BW images). Till now i could not find a lib for image resampling that doesn't use the JAI libs. But using jai means add a 2 mb jar to the already too big package

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And latley I had not much free time so the developing is on idle for a wile.
About the license:
I do plan to release it under Gpl or othe Open License but till now i'm not sure of which license to choose (i'm open to suggestion). And before that i first want to complete the architecture of the software.

So if someone knows a good lib for resizing images that doesn't use JAI just let me know!
Bye
Kirys