how to install mikrotik 3.12 ver

hello,

i downloaded the mikrotik router os ver 3.32 in an ISO image file.can some body help me how to install it on a new system and how to configure it step by step. i installed it but after installation it asks me log in name but i had not set any login name then why it ask. kindly help me soon and give me step by step installation. i will be very thankful

ALI SIDDIQUE

http://www.mikrotik.com/testdocs/ros/2.9/guide/cdinstall.php