Overriding images src url with cloudfront url (Cloudfront Module)

I am currently trying to integrate the cloudfront module into a test install of ProsePoint but keep running into a probelm. The moldule adds a preset to imagecahce where it queues up any images for upload to Amazon. A cron is then run where the images are uploaded to Amazon and the image src is rewritten with the cloudfront src. I have tested this on a normal Drupal installation so I got to work there at least.

Now running the cron and uploading to Amazon work fine however the function override does not rewrite the URLs in the template. I have a feeling this is due to story images being handled by pp_images? Has anyone here tried integrating cloudfront or any other CDN into ProsePoint? Any tips or help or a point in the right direction would be appreciated.