355Ltd. It'll take a long time. Better option is to take a train to wadala. From there cross over to harbour line. You've got trains to panvel with a frequency of 4 minutes. Get down on platform no.1 @ mankhurd. Exit the station. Walk straight. Take a right. Bang! HBCSE :P
this option is best i think... on that day i'll be in khar so this will be easier for me to reach there on time.