My html of my whole tumblr blog is here: view-source:http://firstclassxo.tumblr.com/
i want to insert this header image: http://s3.amazonaws.com/data.tumblr.com/tumblr_le3f1n4gOd1qdb6o1o1_1280.jpg?AWSAccessKeyId =0RYTHV9YYQ4W5Q3HQMG2&Expires=1293550255&Signature =inPHpSnZxsW0LTsfFaHxGKxBgmg%3D

the Html for the header is: http://s3.amazonaws.com/data.tumblr.com/tumblr_le3f1n4gOd1qdb6o1o1_1280.jpg?AWSAccessKeyId =0RYTHV9YYQ4W5Q3HQMG2&Expires=1293550255&Signature =inPHpSnZxsW0LTsfFaHxGKxBgmg%3D

so where would i put it without messing my page?
Please I need a real anwser!