Picshow saved okay in a low colour mode, but failed in 256.
I tried ArtPro, the Aminet version would crash while loading. I found an older version on an AF CD, it loaded, but when saving the pictures appear very corrupted. Then I gave up!
If Visage could save out iff pics like Viewtek, all would be well.
PPaint seems to be the only option here. BTW, I'm not dissing PPaint, it's a fantastic app, just not really suitable for this operation.