a 301 Htaccess file created to redirect old wordpress domain to new one

Hey, I need a htaccess written that will redirect all links (19000 posts and over 65,000 in Google so it needs to be done right!) from my old wordpress site to my new one which is on a different domain. I'm using a custom permalink structure of [login to view URL]%category%/%postname%/ and I'm also using a single word category base, I also want to make sure that all underlying links such as [login to view URL] etc. are redirected. This should be a pretty straight forward project