I had the idea for a while to mod in Chell's outfit from Portal 2 for Jill. so I did that. ... and then things went further. I ended up replacing the RAI-DEN with the Portal gun, and I figured out how to swap animations between guns. and then when I swapped Carlos' animations I was like "I suppose I could make a costume for him too" ... and here we are!
For Jill this replaces the "Classic costume", for Carlos it works for either costume. it should work in all cutscenes too. even the first person ones. (not during Jill's nightmare at the start, as that's a different costume)
Known bugs: - Might have some holes in the body meshes from some angles - neck seam on Jill - skinning? - portal gun might not connect to the back strap correctly - Carlos doesn't hold te portal gun 100% correctly, Jill fires it either like a grenade launcher or a shotgun
Optionally: inside the download in the following folder "PortalPack\natives\stm\escape\character\player\pl2000\animation\bank" there is the optional file to make the Portal gun fire like a shotgun for Jill. this gives it a higher fire rate, but it does make her "reload" after every shot like a pump action shotgun. by default she fires it like a grenade launcher though. If you rename "wp3100.motbankShotgun.3" to "wp3100.motbank.3" you can make it fire like the shotgun.
if there's any issues please let me know. besides that... enjoy~!