kungfuruss posted a video on YouTube for those interested, and the steps are outlined below as well:
1. Select a game icon.
2. Press triangle.
3. Select and click on Info.
4. Select and click on Album.
5. Enter a name, this will be the folder name, by pressing start.
6. Press O to go back.
7. Press triangle again.
8. Select and click on Group Content and select By Album.
9. Voila, your games are now neat and tidy.
More PlayStation 3 News...