A set of tools to help manage your media library. Big improvements are coming to the WordPress media library in 3.5. If your not using the media libr
This plugin allows you to go through all your posts, pages, or custom post types and import any externally referenced images into your media library and attaches them to the post and can even set the first image as the featured image.
It also enables post thumbnail support if your current theme does not support post thumbnails. You can even define a custom thumbnail image size.
If the images are still on the old server you can use this plugin to re import all of them into your media library. You will want to first delete your your images from the media library so it un attaches the broken links from your posts then run the import tool to re attach them and import them back into your media library.
If you do not have permission to use the images and or the copyright does not allow use, then yes it is a copyright violation. It is your responsibility to make sure you have legal right to use any images. PLEASE DON'T USE THIS PLUGIN TO VIOLATE COPYRIGHT LAWS!
For immediate support you can check the #WordPress IRC channel on irc.freenode.net and see if I'm available to help you. Just type ping c3mdigital and if I'm around I will be glad to help. You can also use the WordPress support forums and I will try to answer as soon as possible.