Redirect all posts to new domain (but not JPG files)

I have moved all content from an old domain to a new one, and I’d like the old site to redirect to the new.

I already have a root-to-root redirect set up using this code in the theme’s index.php file:

‘<?php
header( ‘Location: http://www.bayridgeodyssey.com/&#8217;, true, 301);
?>’

I’d like to redirect all of the posts to their corresponding post on the new site, i.e.:

http://www.bksouthie.com/2010/10/memories-of-borough-park/
…to…
http://www.bayridgeodyssey.com/2010/10/memories-of-borough-park/

http://www.bksouthie.com/2012/01/seen-on-third-avenue-lowens/
…to…
http://www.bayridgeodyssey.com/2012/01/seen-on-third-avenue-lowens/

I would assume that there is some similar code I can add to single.php, but I don’t know.

There are about 550 posts – I’d like to avoid doing something manual that lists each one, but it is possible.

Also, I want to make sure references to files (like JPG or PNG images) do not get redirected (I didn’t transfer any of the old pictures).

Any ideas?