I'm sure this is very straight forward but I just can't find out how to get CTA3 Pipeline to allow me to launch the external image editor (PhotoShop Elements 13, which I hope is suitable for this task). At the moment in Composer, launch external image editor is greyed out.  So it looks like I need to tell CTA3 which external image editor I want to use, but I have wasted 1 1/2 hours searching everywhere how to do it!

The next part of my question is how do I slightly modify an existing G2 upper body sprite (from the G2 Body composer kit vol 2 to) remove a bit of detail (a cleavage!) and then re-import it back ready to quickly animate the character again.

I am new to CTA3 and am up against a very tight deadline to get it sorted out. If someone out there can provide some simple step by step instructions on how to both of the above tasks, I would be really grateful.