" Well, i need RSR to PNG to not have to browse all folders with Poser to get the PNGs..." I don't understand, you need do nothing, any time that you open a folder in Poser5/6 the png thumbs will be there, if there are only rsr thumbs Poser will do the conversion on the fly and the process is transparent for you. For Poser4 png thumbs are useless.

Stupidity also evolves!