When you upload the images using the Content management system, the paths are stored as site relive paths:
since you have moved the files, these site relative paths are no longer valid.
you will need to edit each content area that contains an image, and change the site relative path to the new path:
what payment gateway are you using?
If you are using PayPal payments standard, you will need to edit your paypal account and update the IPN Path to the new path to the IPN file: