If you have Mint 4.0 Daryna, you will have Compiz already. Goto Control Panel>Appearance>Visual Effects and tick the Normal or Extra button to activate. Then post again asking for the hotkey combinations, everyone usually does or goto the Compiz Wiki page.
Dell Latitude/LM13 Mate 64
F@H Team Linux Mint on an i7 3770 @ 3.4ghz/CB11 64