OSCommerce SEO

I have been trying to get my head round a site I built not too long ago in OSCommerce. How do I include standard SEO tags on each page? You’d think that any package would allow you to add a title of your own on each page, but not OSCommerce. And forget about meta-description or meta-keywords.
Luckily though someone has written a contribution, plugin or whatever they call it at OSCommerce. This OSCommerce SEO script allows every page, product, category etc to have it’s own title, meta-description and meta-keywords and if you leave any out it inserts the default set.
I’m off to try it on my site now.