Thanks Michael for your reply. But when I upload photos to photopostdev there seem to be some limitations: First of all there seem to be no IPTC/EXIF support so I can't test it. I have to type Image name, keywords, decription manually, it's not taken from the IPTC fields. There aren't any fields for location, country, date pic was taken, copyright etc. So it's impossible to integrate those IPTC data into Photopost and make it searchable?
Then I can only choose two additional categories, it's not unlimited. So what to do if I have to assign a photo to 5 or even more categeories?
There are still quite a lot of questionmarks...