Kreia's mod should have used TSLPatcher and thus had backups. But I assume you installed a bunch of mods over the top of it. Go to your Override folder and look for the following files: 201_carth.utc, 201_cede.utc, 151_carth.utc, 151_cede.utc, 003_carth.utc, 222_carth.utc, 222_ced.utc, carth_holo.utc and delete them. You should be able to install mine after that.
@ADG12311990 if you'd be so kind as to beta test this - https://www.darthparametric.com/files/kotor/k1/[K1]_Diversified_Jedi_Captives_on_the_Star_Forge_JC_Hybrid_Robes_Compatibility_Patch.7z
Edit: I have updated the patch to include a 2DA patcher (thanks to assistance from @VarsityPuppet). It will patch your appearance.2da so that the new model and texture work properly. Read the included readme.txt for further details.