All this explanation is using Drupal 6.
This is a common situation that sometimes happens. You have to fight with a migration with a big ammount of data stored in other engines different that mySQL or an existing drupal installation.
In this case, I had a monstrous DB with almost 35.000 records and 102.000 images associated to these records.
More or less the tables on Filemaker are like this: Read more »