How do i get a 100% mortgage?

How can i get a 100% mortgage or where can i find out about the 100 year mortgage, the one where your parents or relatives can just pay the interest and then you take over the mortgage when they pass away. thanks.
Answer
Talk to a mortgage advisor at any estate agents. they scan a computer with over 33,000 mortgages on it to find the best one for you. northern rock do a 100% they told me.good luck, be sure you know what you are doing!