Can u tell me how to straighten using glatt straighten ing cream?

Heyy. I can't say I know much about straightening cream but does it not come with instructions?
I imagine you just leave it on the hair for a few hours? Not sure.
Here's a website with a little information:
Schwarzkopf straightening cream :: Hair Schwarzkopf Glatt :: Sheapro (http://www.sheapro.com/shop/product.php?productid=17490&cat=309&page=1)

Sorry can't be much help =]