Spark cluster set up on EC2 customization

[Sameer Tilak]

Hi,
I was looking at the documentation for deploying Spark cluster on EC2. 
http://spark.apache.org/docs/latest/ec2-scripts.html
We are using Pig to build the data pipeline and then use MLLib for analytics. I 
was wondering if someone has any experience to include additional 
tools/services such as Pig/Hadoop in the above deployment script?