The RED 5 Keyframe Libraries should have been installed by the RED 5 product installer. If they are not being displayed in the Library Browser window, you can try resetting the directory.
• Go to the RED 5 Library Browser Window
• On the left side of the window, there is a pop-up button between the preview window and the list of presets
• Click on the pop-up button
• From the list that appears, select "Use Default Folder"
After you do this you should see a single item labelled "RED 5 Keyframe Library". Click on the triangle to the left of this text to reveal the sub-directories that contain all of the Keyframe Effects.
It may be that you are working with a non-standard installation, which in this case means that you have installed the product on a drive other than the "C" drive. If that is indeed the case, then you need to click on the "Choose Folder" option and navigate to the drive where the product is installed, then go to Boris FX, inc\Keyframe Libraries 5\ and you should be all set.
If you try that and it does not work, then please get in touch with our support department (firstname.lastname@example.org) and one of the techs will assist you in resolving the problem, free of charge.