Does anyone know how to do a cable cast on?
Here's a link to several different cast on methods - the cable cast on is third down. http://www.knittinghelp.com/videos/cast-on
Also you might try youtube, they should have some video's if that works better for you.
Here is another source of info on your question.
And all the women who were wise of heart spun with their hands, and they kept bringing as yarn the blue thread and the wool dyed reddish purple, the coccus scarlet material and the fine linen. Ex. 35:25