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You will to creat virtual drive for this
Image Finder
1.Open Alcohol. On Left side click on image Finder
2.A new Image Finder window will open.
3.Select the location drive where image is present.
4.Click Search.
5.On the right blank space image will appear.
6.Right click on it and select Add selected file to Alcohol. OR just double click on it.
7. Image finder window will be closed and image will be added to main Alcohol window.
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Mount Image
1.Now Right click on Image and select Mount on device
2.Select virtual drive you created
3. Wait
4.CD / DVD auto run window will start
5.Install game or software