Macworld has posted an article by Albert Filice explaining how to create your own Fusion Drive from a normal hard drive and an SSD. It’s not difficult if you’re comfortable working in Terminal, but be sure you have full backups before you start, because the process will erase both drives. follow link
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Expose Shortcut for Arrange All Windows
In Expose in Snow Leopard, with all windows visible, press F9 (or the Expose key [F3] on recent Mac laptops), then press Command-1 to arrange the windows by name or press Command-2 to arrange them by application.
Make Your Own Fusion Drive