I never seen nor used imagemagic before today, and I really dont know where to start, I did found a standalone zip and so far its nice to look at to get confused. So point me in the right direction to get to the command line.
Oh and the preferred output is .png instead of .ico.
Looking at the cropping (1st link ) looks like a decent way to go breaking up into individual files.
On the other page,the .tga all look like mirror tiling.
I have flattened it and merged all layers so now i just need to split into 40x40