There is a very comprehensive examination of the functions of samatha and vipassana in enlightenment at the link below. Written by Bhikkhu Sujato and well worth reading.

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Wide open are the doors to the deathless!

Let those with ears to hear make sure their faith

With this inspirational proclamation the Buddha declared the freedom he had realized available to all. Nothing less than escape from death itself was his promise, and this goal was available to anyone willing to listen to his message with a sincere and confident heart. Although many teachers had appeared ‑ as they still do today ‑ with such extravagant claims, the distinctive feature of the Buddha's teaching was a pragmatic course of spiritual training leading step by step to the goal.

This essay is an attempt to clarify the meaning and function of samatha and vipassana in Buddhist meditation. Much has been written on this topic, yet a cloud of confusion persists. I am painfully aware of my presumption in treading where so many more worthy have gone before; however, it seems perhaps worthwhile to gather together many of the Buddha's own statements on the subject in a form neither obscurely technical nor patronizingly simplistic, and to present that material within a consistent and reasonable framework of interpretation.

http://www.budsas.or...wiftpair/00.htm

Thanks C.

Looks an interest read.

I've book marked it as a reference.

Me too.. thanks C.