UPDATE: mViewer GX has been ported to the cp400, so it's now available on every color calc! http://tiplanet.org/forum/viewtopic.php?t=15013&p=168434#p168434

However, I would like to remind everyone to use common sense when using any calculator image editor or viewer out there (even TI-Connect), preferably restricting your use of it for BASIC games or for learning. The potential that community image converters might fall under the wrong hands (and result in Casio locking their calcs even more, which they did with the cp400, since Physium appears to be part of the OS) is why Cemetech has opened a topic asking if users think a similar SourceCoder 3 feature for the American PRIZM models would have its place or not (I'm personally for such feature, as my post states there, but they're free to do as they wish). http://www.cemetech.net/forum/viewtopic.php?t=10516 . It is seen as a much smaller concern as it was back in 2012, though, because the HP Prime and 84+CSE models are accepted in tests despite having color image support and anybody can create 8-color PRIZM images on-calc as they see fit (although it will take a long while).

Otherwise, this could open new possibilities for BASIC coders, such as a Shining in the Darkness, Myst or Illusiat remake.