In PyScripter to comment a block you can use the following keyboard shortcut: ctrl + " (press and hold ctrl as you press the " on your keyboard).
To uncomment a block you simply highlight your commented block of code and use the same keyboard shortcut listed above.
As long as you import arcpy, you should see module information as you type. This is a nice feature because it allows you to view the required parameters to the geoprocessing tools being used.
