Bodies from HGEC Body with BBB v1.12
Textures from different mod because in HGEC Body with BBB v1.12 are no textures for Shivering Isle races.

Install meshes and textures folder into your data folder. NOT the "Other HGEC bodies" folder ! ! 
Now you have HGEC E cup
If you want another cup/body open the "Other HGEC bodies" folder . There are AA  to H cup and DM and DMRA (DM = Double Mellons, RA = Round ass )
Copy the nif file in your game folder data\meshes\characters\_male  then the player and all NPCs will use the body. 

You know from my Link
https://www.loverslab.com/topic/36443-oblivion-install-gametoolsbodiesbbbmod-sorting-and-cleaningcs-cse-body-stretching/?do=findComment&comment=915257
There are only a few full armor-clothing replacers. A, C, E, D, DMRA.  It looks strange when the breasts are different sizes naked and clothed.



