The partition that you create using Boot Camp is simply a partition that is ready for installing windows.
Follow the instructions in the Boot Camp help files, or from the Apple service articles.
You said that you don't have a Windows installer disk. Is that correct?
Then, you next step is purchasing a Windows installer disk. Be sure to purchase a Windows full installer, and not a Windows Upgrade install.
Here's some possibilities: http://www.amazon.com/Microsoft-Windows-7-Home-Premium/dp/B002DHGMK0
If you already have the Windows installer CD, and you have already created the Boot Camp partition, then boot to the Windows installer, and follow the directions to install Windows.