They replied to me with some instructions, I haven't tried it out yet. I hope this works and helps you guys out:
Message by Support Tech Jesse on Tue, 30th Oct 2012 1:20 pm
Hello Shane,
Thank you for contacting Steam Support.
You may be able to use these files if you do the following:
Download and install IrfanView (A well known free image editor)
http://www.irfanview.com/Open the image in IrfanView and click File>Save As
Choose JPG in the "Save as type" box
There will be a second window titled "JPEG/GIF save options"
Slide the quality bar to adjust the quality. You may want to stick to 100% for now.
Also, uncheck *all* check boxes, *except* the box labeled "Reset EXIF orientation tag"
Save the file in your game folder:
Usually C:\Program Files\steam\steamapps\<Account Name>\<game name>
Launch the game and test the issue.