Kanten
Customization is possible in the Tools Menu/Movie Menu and the Movie Menu customization to a certain extent.
You can do extensive customization of the disc menu by editing its .psd files that are located on the computer hard drive.
Photoshop CS higher is needed for the edits of the .psd and, depending on certain circumstances, Photoshop Elements may be enough to get an .psd edit accomplished. You can create your own disc menu for Premiere Elements using Photoshop CS or higher provided you adhere to the strict requirements for doing this.
The following are some of my how tos which seem to go to what you want to do....
http://www.atr935.blogspot.com/2013/05/pe-one-page-14-scene-buttons-dvd-menu.html
ATR Premiere Elements Troubleshooting: PE: Adding Movie Thumbnails To Disc Main Menu
Please review and consider. There are more how tos but let us start with the above.
Looking forward to your follow up.
ATR