I found this nice piece of code that redirect all your old site urls to new site urls.
Main URL and all URLS bellow it to appropriate URLs on a new domain.
etc in my case
and its only two lines. Add this to your .htaccess
www.generaltopics.info -> www.topicsplanet.com
www.generaltopic.info/some-url/ -> www.topicsplanet.com/some-url/
So forget doing redirects for all of your urls manually.
RewriteRule (.*) http://www.newsite.com/$1 [R=301,L]
Here are few examples: