You're confusing portraits and cyberfaces. Portraits are the 2D pictures and cybers are the 3D model faces. Regardless, any mod you want to install should be placed (intact in its' zipped file) in the main MVP folder (yes, along with TiT). As long as the cyberface ID no. and the ID no. in a given roster match and are correct (official), you should have a good match. Typically, Rising Son uses the official ID. Initiate TiT and open the given zipped mod you want to install.
What rosters are you using? That is, to which version of MVP are you trying to do these installs?