OnT: I guess it is not by chance, that RSR just happens to be obsolete with the same version of poser which has it's library implemented in flash. I am not familiar with flash, but since it is mainly used to realize blinking web-buttons, it is probably considerably easier to display png-images than any other old format. As far as i know there is no format description for RSR available, so even the third-party tools cannot easily support it. Not even ImageMagick, which otherwise supports any image format regardless how rare it was :-(