I need a guide to MEGA2.1 - (Feb/24/2005 )

I have a software named MEGA2.1 which for me is used to establish phylogenetic trees.But I don't know how to operate it correctly.So could
you please do me a favor to send me a guide to the MEGA2.1
my Email:hdeng@issas.ac.cn

Maybe you can find it in their webpage
http://www.megasoftware.net/
Cheers!