I did still not migrate from vB + PP, @Chris D, but am shortly before doing it finally. In the meantime I did lots of test imports. One remaining problem is, that users in PP could upload images into their "Private Albums". These albums were just one main album per user, which contained all images, which were not uploaded into a sub album or a category. So, in my case I have around 30k images within the "Private Albums" from hundreds to thousands of users. After importing to XFMG all these images are in one single category. Not albums, sub albums or sub categories. So far so good. What I would like to do now, is to run some queries in phpmyadmin, to move all these images from the single category into one album per user, which probably has to be created before/while moving. So, after PP -> XFMG migration it is for example: User A Album a with x images Album b with y images Album c with z images q images in migrated Category "Private Albums" u images in Category 1 v images in Category 2 w images in Category 3 After the queries it should be like that: User A Album a with x images Album b with y images Album c with z images Album d with q images (from Category "Private Albums") zero images in Category "Private Albums" (Category will be deleted) u images in Category 1 v images in Category 2 w images in Category 3 And the same for all thousands of users. Album d can automatically get the name of the user or just be named "Private Album" for each and every user. One important thing: the ID of the migrated images must stay identical, to somehow be able to redirect with redirect scripts, which I have for all Albums and Categories from PP. Can this be achieved? How please? Please do not say "not possible", 'cause my users simply won't accept, that their main private album is suddenly part of a collective category. As I did not finally migrate I could do something before/while importing or the importer could be modified. I am willing to fund the modification. Any hint is appreciated.