Add icon to pdf document types

1. Copy the pdf image icon file to the “Common Files\Microsoft Shared\web server extensions\60\TEMPLATE\IMAGES” folder, maintain the size of the image.
2. Open the “DOCICON.XML” file which will be in “Program Files\Common Files\Microsoft Shared\web server extensions\60\TEMPLATE\XML”
3. Type inside the tag.
4. Restart IIS this to take effect.
5. Now all uploaded pdf document will be shown with pdf image