PiZero is known for creating excellent themes for Symbian and Nokia Smartphones. Some of their past theme include the beautiful Solstice theme and the Ovi theme. If you are in a Halloween mood, PiZero has just released a Halloween theme for Nokia and Symbian Smartphones.
The Halloween theme by PiZero is compatible with both Symbian 3rd and 5th edition. So you can install it on N95 and N97 or Nokia 5800 as well.