SSL Key Setup

Hey, Sorry if this is OT, I figured that since I'm trying to build a osCommerce site it would be alright... So I'm trying to figure out how to setup a certificate. I already have the certificate and some other files. Here are the files I have: www.mydomain.org.crt which looks like: -----BEGIN CERTIFICATE----- a bunch of jumble ending with two equal signs and then -----END CERTIFICATE----- www.mydomain.org.csr which looks like: -----BEGIN CERTIFICATE REQUEST----- again a bunch of jumble that ends with two equal signs and then -----END CERTIFICATE REQUEST----- www.mydomain.org.key which lookds like: -----BEGIN RSA PRIVATE KEY----- Proc-Type: 4,ENCRYPTED DEK-Info: DES-EDE3-CBC,DFBDD772CB177D84 skip a line then a bunch of jumble ending with two equal signs and then -----END RSA PRIVATE KEY----- so what command do I use to get that key setup on my machine... any ideas? -Michael