So for the first one, are you saying more or less what I made transparent in this picture?
Because if so, I have
a download to it here, as well as a description of what I did.(In case you can figure the other part out)
And for the second part, I have an idea for a generic stock icon:
Open up the common5, go to sc_selcharacter_en, MiscData[90], Textures(NW4R), and scroll to the bottom. InfStc.981 is the one that I am referring to, and it's already considered a stock icon; you could just replace the other stock icons with that texture and it work the way you want.