I was working on Photoshop and wanted to know if there is a way to slice it into two equal halves, left and right.
Yes. There is the Slice Tool, and Slice Select Tool located under the Crop Tool in the Toolbox.
Here are tutorials for both. http://www.beekeepersblog.com/p/blog-page_6618.html
You can also drag out a guide to 50% of image, then use a rectangle slection tool and drag across 1/2 the image. Then Layer>New>Layer via cut (shift+ctrl+j) This will move the selected 1/2 onto its own layer.
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