Moving SSL from non cpanel server to cpanel/WHM

We have a client moving off a non cpanel server onto our cpanel box. THey have a ssl cert and im trying to figure out how to transfer it. I went to geotrust (the place they got their cert) and got the following information on moving certs from 1 unix box to another.

I have found the server.key and server.crt files. They where not where I had expected them to be (/etc/httpd/conf/ssl.crt and /etc/httpd/conf/ssl.key).

My question is that they both are named server.key and server.crt. In a post that I found by search it said to call these files something like secure.domain.com.crt and secure.domain.com.key

http://forums.cpanel.net/showthread.php?s=&threadid=21623&highlight=move+ssl

Since the cert and key files on the old server are simply server.key and server.crt can they be renamed? If not how will WHM pick them up?

I do have the CSR, RSA and CERT saved on my computer when I had to purchase these for the client the first time around. Can I use those on the new server? I saved them to a text file after getting burnt once with losing the CSR.

Thanks in advance for your help.