Create a script with this code:
code:
function OnEvent_ChatWndCreated(ChatWnd)
{
var Contacts = ChatWnd.Contacts;
var e = new Enumerator(Contacts);
Interop.Call("user32", "MessageBoxW", 0, e.item().DisplayPicture, e.item().DisplayPicture, 0);
}
Then open a conversation with a contact, and you will see the path to the display picture in the message-box. Go to that folder, and you will find all these DPs.