Hi everyone! Photogallery timing question

I’m trying to make the Kirupa photogallery change images on timed intervals (many thanks for the great work, Kirupa!!)
Here is what I need help with: I want to have two sets of images - main image displays, it has a subset of 3 images which cycle through in a second movie clip (MC2), then another main image comes in at a timed interval and it also has 3 sub images that display in MC2.
I hope I’ve explained this fairly well …
I’m not a programmer, but I’m learning … so if anyone can help I would be very grateful!