Is there a picture viewer (besides the built in one) that is compatible with Sprint's picturemail?

Campatible means either:
1) Can send a picture through sprint's picturemail system directly from viewer
2) Uses the same file structure (DCIM folder) that Pics&Videos (built in viewer) uses so that I can view and catagorize pictures with the new viewer, but then use Pics&Videos to send a picturemail

I know most viewers allow you to send pictures via email, however this isn't a good substitute for the Sprint PictureMail in terms of sending pictures to another SprintPCS phone. Various family members like getting the pictures and a voice memo directly their phone. It is easy and convenient.