If you have the WYSIWYG plug-in installed, you can use the ‘Insert An Image’ button to call up the Image Management tool. However, if you are logged into your blog, it is accessible with this link; http://yourblogname.blogsome.com/wp-admin/iimage-browser.php
Deleting Images
Click on an image, then click in the checkbox (Full size) to the right of the ‘Delete’ button, then click on the ‘Delete’ button.