To customize your Windows 7 themes you will need some good Windows 7 screensavers. Unfortunately, you can’t really find many good screensavers out there. Anyway, here are some you can use to customize your system.

Fire Screensaver

Underwater Screensaver

3D World Screensaver

The Matrix Screensaver

You can download all of the Windows 7 Screensavers here:
Download Windows 7 Screensavers

If you want to download more screensavers for Windows 7, XP and Vista, you should check out the following site:

I’m also working on some more screensavers, but I haven’t found a good converter yet that allows you to convert a gif or an avi file to a screensaver.

You might like these sexy wallpaper, tweaks and themes:
• 
  Emma Watson
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  Secret Tweaks
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  Mac OS X Lion