Thanks, Ken. But I'm not sure if this instructions was useful to me... Anyway, I've found the solution. If you are interested, read on... IrfanView AND Explorer did all the job! I've opened Irfan View>Batch conversion&rename option (...browse the folder (Look in) where all mixed pictures are saved...and select View Menu>details. Right click on columns>choose sort by> DatePictureTaken (if not there >select More)... Click on that column.. after appeared among others 'sort by' options.. and voila! Select all right sorted 'mixed' files and drag them to the Input files (on left side)...select output folder and batch rename# option... Need more help? Bye,Primozz