Launching a spark ec2 cluster from windows

I'm running windows 8 and would like to launch a spark cluster. I'm using the this tutorial. It isn't running with windows CLI, so I tried installing and using cygwin. With that I was able to change the environment variables and also run the ec2 script but I get the error:

ERROR: The identity file must be accessible only by you.
You can fix this with: chmod 400 "SpakPlaygroundKeyPair.pem"

So I'm stuck here. I saw that in This Question it was suggested to run the python file directly, which is actually what I want to do, but I'm not sure how. e.g. When you run the script, you have to specify things like

 --key-pair=SpakPlaygroundKeyPair --identity-file=SpakPlaygroundKeyPair.pem --region=us-east-1 --zone=us-east-1a --instance-type=t2.micro launch my-spark-cluster

How do you tell that to the python script?