I don't know anything about battle script pro. But doing a little investigating, I believe I have found the checks for Overgrow, Blaze, Torrent and Swarm. Using the bin outputs from abilities put into the resource thread, I copied the bytes used to check the ability, changed the index number, and found locations where they matched.
Try looking around 3F153, 3F183, 3F1B3, and 3F1E3. I believe those to be the actual ability check command for the 4 power up abilities, so around there would be the beginning to that section of the script.