Please start using proper English, since your posts are very hard to read.
Your Apache is already SSL enabled (using
mod_ssl), so you don't have to install anything. The 4 files (not folders) you're seeing are probably self-signed certificates. You can check this by pointing your browser to https://<your-server>/ and examining the certificate details. For more information on setting up SSL/HTTPS see the
mod_ssl documentation.
If you want a certificate for your company you can set up an
internal CA (certificate authority) using OpenSSL. For a globally trusted certificate you'll have to buy one from one of the certificate providers (VeriSign, GlobalSign, Thawte, ...)