The import script works fine if you input the proper information and do the cleanup
I have personally imported many vbgallery sites and one of which trackpads site was 380,000 images and numerous categories.
This import script is a script to Import vbgallery to Photopost Pro
What your trying to do has nothing to do with an import script. You need to use the vbgallery upgrade script and updated your 1.01 to 1.02. You can not use this script for what your trying to do