3 ways to import data

http://rc.crm.dynamics.com/rc/regcont/en_us/OP/articles/importtools.aspx

• Import Data Wizard: Used by any user for importing one type of record at a time.
• Data Migration Manager: Used by the system administrator to migrate data from another customer relationship system.
• Microsoft Dynamics CRM Software Development Kit: Used by a programmer to develop a custom import solution.