terraforming

Does someone have a link to instructions or a guide on flattening my little plot of land? I know there are other 3rd party mods with tools to make it easier but I tried using the Ender's one and kept crashing my game with java 6.0. I dont mind doing it manually and I thought I saw somewhere how to flatten a tile using shift and right click but seem to have lost that info. Any help greatly appreciated.