If you are talking about RTMM Required Libraries Part I and RTMMTwo Object LibraryFSXP3D, they have very specific installation instructions that must be followed. While I'm not familiar with Additpro other than having read the name somewhere, I assume that it's some kind of automatic installer. You must install both libraries manually and carefully according to their instructions. You will need to track down what you've already installed, delete everything and start from scratch or you will experience lots of problems down the line with black textures, etc. Post back if you need more help.
Steve