1. With MEP closed, make a backup copy of C:\Documents and Settings\All Users\Application Data\MAGIX\Movie_Edit_Pro_MX_Premium_Download_Version\IntroOutro
(or your location if different)
2. Copy that folder's contents to the 2013 equivalent, C:\Documents and Settings\All Users\Application Data\MAGIX\Movie Edit Pro 2013 Premium\IntroOutro
accepting offers to replace existing files.
Or just copy the specific files in MX that are missing, like those you mentioned.
3. Edit Translation.ini (or Translation_EN.ini, or whatever) in the Intro/Outro folder by adding the necessary new lines. You should be able to see how to do that by examining existing entries. Here again, take the usual precautions. Or carefully copy/paste them from Translation_EN.ini in the MX folder.