It is 4 cds but I just installed it in a different folder where I put all my beloved old games. I don't understand what you mean by "what I put in Registry for both games" can you please elaborate? If you mean the "Regedit" step I found in the forums I wanted to set the Path as install folder but it was already set like that.
D:\Installed Games\KoTOR Collection\Kotor I
D:\Installed Games\KoTOR Collection\Kotor II