Hi @nicksouter,
You might find the Healthy Brain Network project easier to deal with. It has been curated to BIDS and can be downloaded with Amazon S3.
The S3 bucket is at s3://fcp-indi/data/Projects/HBN/BIDS_curated/
It contains resting state and two movie watching tasks. I do not think you have to worry about removing dummy volumes.
Best,
Steven