This is a horizontal hotbutton window with inventory on the left, based on t.kings vertical spellbar(v4).
This download includes green and black button .tga files. The hotbutton window has blue buttons by default(green shown). If you want to use the green or black buttons, delete or rename A_tk_hotbtn.tga then rename grn_A_tk_hotbtn.tga or blk_A_tk_hotbtn.tga to A_tk_hotbtn.tga.