The presets section of the manual covers the whole importing process, I think, as well as where to find the presets. With CompositLab its pretty easy, as they are all in the same place. Click the "FX" logo on the timeline laer you want to add the preset to.
The Gold, Silver, Bronze thing is just a rating of the quality of the preset, and has othing to do with their installation. However, each preset also has a list of icons indication which programs it is compatible with. Any presets missing the CompositeLab icon won't install into CompositeLab.
Can you confirm that the original presets that come with the program are installed properly? If not, try a clean reinstall.
If so, and you are still having a problem, let us know the name of a specific preset or two that are causing you problems, and we'll go from there.