This plugin will easily move your old wordpress domain name into the new domain name. This plugin dedicated to Evlin Marcelline
Only 3 Steps :
Download the Zip file and extract everything and put them into your /wp-content/plugins/ directory. Activate the plugin from the Plugins menu in WordPress administration page.
Go to Domain Name Changer menu under the Settings tab, and insert your old domain name into the textbox (donít forget to insert the http:// before your old domain name) and then insert your new domain name (donít forget to insert the http:// before your new domain name)
Move all your WordPress folder and database to your new domain, and open your new domain name in your browser. Thatís it :) .