Hmmmm While I dont have a PS2 anymore I dont think that this is possible. I will have a look around and if I come across any information I will post it here.
EDIT** Ok after a quick google search I have come across a way to make it possibe but it seems very long winded. If you wish to try it then take a look at the following link
http://www.thinkdigit.com/forum/showthread.php?t=56753