You'd be better off in the long run to use a database, trust me. Take a little time to learn how to use them. You can do it either way, though.
You can pretty much write anything to a database. Anything you can assign to a PHP variable which includes numbers, text, and files.
If your not familiar with PHP/MySQL, read some tutorials. You'll find a good one at http://www.hotwired.com/webmonkey. Click on programming and php. There are also some good tutorials and information at www.devshed.com and here on PHPbuilder.
---John Holmes...