when I was first Nuke'ing I had this problem :

search engines want unique pages , they want unique meta tags for keywords and description.

hacking the meta.php in Nuke is fine if you want a set of keywords and description to run through every page on your new site i.e. mysite,its, great
and "my site is great and you should go and see it now "

but search engines want variety and for this reason I was stumped ! So I found a module that sort of did the job and I hacked it so it would incorporate both Nuke news stories and the content pages

it's been implemented on a number of my sites and works well , it's very easy to add and edit keywords from the admin panel.

The forum on this addon
http://www.voice-changer.net/seo/forum6.html
The Download
http://www.voice-changer.net/seo/downloads-file-3.html
The main site http://www.voice-changer.net/seo/index.html