As someone else said you should realise the dangers of
putting a machine on the Internet before you do so. In
addition many ISPs only hand out temporary IP addresses to
customer unless they pay for one. This would make it very
difficult to host a site which is visible on the Internet.
If you don't want to make it visible on the Internet, that
is, you only want it visible from your network or your
machine, then you can add the Domain Name to your hosts file
(location c:\window\system32\drivers\etc or
c:\winnt\system32\drivers\etc) against 127.0.0.1. Add a new
line to it.
Many ISPs give subscribers a certain amount of space on
their servers. Some will even allow you to point you own
Domain Name to the space. Please consider this before you
put a possibly vulnerable machine onto the Internet. You
could create the pages on your machine and view them via
http://localhost on your machine, and then move them up to
your space on the ISPs server.
Cheers,
Cliff