Hi Kevin,
There is a lot you haven't told us...

Have you created your site in phpWCMS? If so, you can set up a contact form in phpWCMS that will either send the details of the form -- in a user-defined format -- via e-mail, or it will keep all the responses in a database that can then be downloaded and read in Excel or another spreadsheet program. Pretty nice feature.
If you haven't set up your site in phpWCMS, you are probably in the wrong ballpark. I would highly recommend you use the whole CMS, but it almost sounds like you ONLY want a php form that will send mail with the response.
Is your site live yet? I'd like a look.
greg