Help - How do I get a server certificate from CAcert?
Firstly you need to join CAcert to do that go: here
Then you need to generate a Certificate Signing Request, for more details go: here
You then need to add the domain you have control of to your account, which you can do: here
System will send you an email with a link in it, you just open the link in a webbrowser.
Then you need to submit the contents from the CSR file to CAcert, you need to go: here
CAcert then sends you an email with a signed copy of your certificate. Hopefully the rest should be pretty straight forward.