Saving dds files can be quite tricky, because if you don't save your moddings in the correct size, Lara's lips might be somewhere on her chin etc, when running the game with the modded textures.
So I have made a list for some outfits of both TRA and TRL (including the ID's to find them in Tomb Ripper):
Tomb Raider Anniversary
Legend Outfit:
Face, ... :
333 – 1 bit alpha – Generate MIP maps → 10
Lips, legs, eyes, ... :
334 – 1 bit alpha – Generate MIP maps → 10
Hair :
336 – explicit alpha – Generate MIP maps → All
Hair 2 :
337 – explicit alpha – Generate MIP maps → All
Braid :
338 – 1 bit alpha – Generate MIP maps → All
Clothes :
331 – 1 bit alpha – Generate MIP maps → All
Anniversary Outfit:
Face, ... :
153 – 1 bit alpha – Generate MIP maps → 10
Lips, legs, eyes, ... :
154 – 1 bit alpha – Generate MIP maps → 10
Braid :
167 – 1 bit alpha – Generate MIP maps → All
Hair :
156 – explicit alpha – Generate MIP maps → All
Belt (For Pistols) :
168 – 1 bit alpha – Generate MIP maps → All
Shirt, ... :
151 – 1 bit alpha – Generate MIP maps → All
Pants, ... :
152 – 1 bit alpha – Generate MIP maps → All
Tomb Raider Legend
Swim Suit:
Body :
4507 – 1 bit alpha – Generate MIP maps → All
Legend Outfit:
Hair :
144 – explicit alpha – Generate MIP maps → 1
Clothes:
152 – 1 bit alpha – Generate MIP maps → 9
Body (eye, lips, legs, ...) :
147 – 1 bit alpha – Generate MIP maps → 10
Face :
146 – 1 bit alpha – Generate MIP maps → 10
Evening (Ripped):
Dress :
3657 – 1 bit alpha – No MIP maps
Purse, Panties :
3655 – 1 bit alpha – Generate MIP maps → All
Body (Legs, arms, ...) :
3654 – 1 bit alpha – Generate MIP maps → 10
Hair :
3653 – explicit alpha – Generate MIP maps → 1
Yeah, I know... not an outfit
Bolivia Level - Water:
Big Waterfall (down the mountain) :
20231 – 1 bit alpha – Generate MIP maps → 8
Water (looks like the Ocean) :
20230 – 1 bit alpha – Generate MIP maps → All
Water (moving / Waterfall) :
20228 – 1 bit alpha – Generate MIP maps → All
I hope this will help