1. Copy folders in "crack" to "C:\Program Files (x86)\NetSarang\"
2. Add this lines to hosts file  (C:\Windows\System32\drivers\etc):
127.0.0.1 activate.netsarang.com
127.0.0.1 sales.netsarang.com
127.0.0.1 transact.netsarang.com
127.0.0.1 up.netsarang.com
127.0.0.1 update.netsarang.com
127.0.0.1 www.netsarang.com
127.0.0.1 www.netsarang.co.kr