Now that you've installed Pipecode, fire up a browser and point it to the address of your new webserver. The installation wizard should be visible. If not, then you foobar'ed something and need to go back.
Pipecode sends users email for registration, notifications, and other stuff. Therefore, you need a valid mail server account. The default SMTP port is 25, but port 587 is becoming popular for submission. Pipecode will use SMTP AUTH with TLS encryption. If your server doesn't support this, well, it should. Fix it.
Fill in the required information, such as "SQL Server", "SQL Username", "SQL Password", and "SQL Database"
You should get a textcaptcha.com API key so that you can download new CAPTCHA strings. If you don't want to use their free service, you can generate your own and leave this field blank.
Enter a username and password for the admin user account. You will do all further configuration to the system by logging into this account.
Once you are satisfied, click the "Save" button at the bottom to generate your config file. If all goes well, you should be up and running with a new Pipecode installation!