► click on Start button and type the name of the program (In our case its photoshop)
► Now right click on the program and click on Properties
► In the Shortcut Key field type any key that you want to use as shortcut.(I will use P for photoshop)
► Now your custom shortcut for this program will be Ctrl+Alt+Key (So my shortcut is Ctrl+Alt+P for photoshop)
► Press Ok button to save these changes and then close the dialog box.
► Now you can use the custom shortcut to launch the program.