Add tags with ajax to oscommerce/creloaded website

Are you familar with tags and ajax? If so, I'd like for you to add it to my existing oscommerce/creloaded website. More specifically, I would like the ability for a user to tag a category or products with keywords they define. On the category or products page there will be a button that when clicked will pop open a div using scriptaculous scripts and post to the db using ajax. On the left column there will be a tag box that will display tags for that particular page. There will also be a main tag page that will display the top 100 keywords for the entire site in a tag cloud. I can show examples of what I have in mind and I have several premade scripts that I have that should make this job easier for you.