Instructions
Connect to the Internet. Go to the "New Grounds Custom Lightsaber Builder" (see Resources) and click "Play".
Choose a hilt to use for your customized lightsaber. These can either be single or double-sided, depending on your desire. Click on the hilt you would like to use, and drag it down to the "Workbench" section.
Choose one or two blades to use for your lightsaber. These need not be the same color or even relate to anything seen in the "Star Wars" movies. Click on the desired blade (or blades) and drag it down to the hilt so that it looks like it is attached.
Take a screenshot of the design to save it. This can be done most easily by pressing "Print Screen" on your computer, which will save the screen to your clipboard. You will then be able to save your lightsaber or e-mail it to friends.