different modder usually use different name also different format so i dont remember each exact name but for ylsama hanying case u only need to export 2 file, "cf_0_face_UV_map" and "cf_M_face_00".
based on the UV map u can see that other than the face skin it also contain eyeline, tang and teeth so u need to isolated those so it wont get edited.
warning: ylsama headmod need more work since he make all the face part in 1 png, it easy to track but pain to edit without editing software.
i make 1 copy of cf_M_face_00, the copy got it brightness increase while the original stay on its original color.
with coreldraw, i do 2 things,
1. cf_M_face_00 original got it face skin removed leaving behind eyeline, teeth etc while keeping the face skin transparent.
2. cf_M_face_00 copy got layered with my preferred skin color with (usually) 50% transparency.
after that i put layered cf_M_face_00 copy on the bottom order while the cf_M_face_00 original on top order making a new png with lighter skin color and still original eyeline etc color.
i have little to no experience with other editing software so i cant help with those...
if it to much to process...
hanying