[Hampshire] Subdomains on a CentOS box

Hi there,

first post for a very long time.

I have a CentOS 4.1 box running Apache (not sure which version but I
know it starts with a 2 ;o) ) which I'd like to get a subdomain
running on.

I've never done this before so where do I start?

My httpd.conf file is blank (this was my first port of call) so can I
just can the subdomain info to that or do I need to configure
something else.

Like I say, I'm a bit new to web-hosting on a Linux box so please be
gentle with me.

Please let me know if you need any further information.

Regards,

Richard