SSL cert import question (2008r2)

[edutech4schools]

Hello, I recently took over a small primary school when the last tech mucked up the new server install. I have got everything back up and running and want to set up a secure ssl site in IIS on the 2008r2 box. I was just about to request a new cert from SSL Certificates SSL Wildcard SSL Free Certificates SSL Server Certificate 256 bits when I stumbled on a folder on the server with some certificates in. After asking a few questions it turns out the old tech had already created some certs using an Adito system which I think is based on linux (not sure), anyway none of that setup exists any more.

Is it possible to import and use the certificates already saved on the server or do I need to run through setting up a new cert process?

NB. I am a noob when it comes to certs

Cheers

[edutech4schools]

ok found out I will need a new cert as I do not have the key file.

going to create a new post for that.