So if you're after a map/screenshot solution rather than a video, there isn't much out there. Most of the sites that hosted them don't exist any more or have broken links. Even the Official prima guide is gone, after a couple of hours of searching I managed to find the following link and thought I'd share it with you guys. After all sharing is caring.http://xbox360.gamespy.com/xbox-360/crackdown/guide/page_53....
As a warning, some of the images are repeated in multiple places and a couple of the map location imgs are incorrect. So my advice is to go through and complete the game, take out each of the gangs and try to get as many orbs on your own as possible.
That way you are only using this incomplete guide to hunt down the last remaining stragglers.
I do not own any of the pictures or content on these pages they are property of their respective owners.