help with textures

[wickerman85]

hi all, ive got 4 new textures placed inside oblivion\Data\Textures\Creatures\bloodskeleton the textures are skeleton_n.dds, skeleton.dds, skeleton_n2.dds,& skeleton2.dds now how do i get these onto a new enemy in the cs? theve been made by another member of my mod team but hes stumped on whats going wrong

ive tried unpacking the meshes bsa and copying the skeleton.nif from it into oblivion\Data\meshes\Creatures\bloodskeleton and then making a new creature skeleton and using this .nif as hes nif but theres no models i can use in the models tab and on the preview window hes inisable ie placed himin aroom to see and then gone there in the game and theres nothing visable but when i swing my sword hes there i kill him and then i get a ctd, can any1 help with this? ive no idea whats going on and im clueles with the texturing part