I included them only because they are no longer available on SC - Khajiit Improvement, and the body textures simply won't match with anything otherwise. I included facial textures, but I didn't edit them. Bear in mind I'm not a texture artist, so the work isn't going to be 100% perfect, but I hope it's acceptable. Generally the edits are subtle, but hopefully noticeable, mostly fixing seams and so on. I originally did some edits and uploaded them to the Hall of Torque, but they no longer host mods I was in the process of doing some edits for myself so I decided to upload a newer package here. However, those were never really destined for the SAM body shape, so there were several inconsistencies when you used it.
It uses the textures that are already included in the base download (made by SinglesCat). To say that this is a retexture isn't entirely true.