Take a baby blanket pattern and just add more stitches to make it larger. Or make the squares with 12 sts instead of 8 or something. I used this tutorial as a basis and made one with 15 sts on large needles.
Oh I'm sorry, I didn't know the site had expired. Just about any tutorial will do though, here's some others which I think are still good. Even if some are scarf size, you can CO more stitches and make more blocks or larger blocks with more stitches.
There are several patterns over on Ravelry if you search entrelac throw. I like Sue's idea of the larger rectangles for the throw. It gives a softer look.
Here's an Ann Norling pattern and hers are usually very clear. http://www.nobleknits.com/ann-norlin...tting-pattern/