There is a plug-in that I loved, Add Products to Categories by Keywords, and I used it on my old 1.3.9h sites, and it was a breeze to use.
I know it says that it's only compatible up to 1.3.9, but I figured I'd give it a shot with 1.5.0. No dice
Is there a similar plug in that will allow me to search my products using a keyword, have it find all products that have that keyword in the description or Name, and allow me to copy products that match my keyword to an additional category?

For instance the keyword: Celtic. It would search all my products names and descriptions for the word Celtic, and return a list that I can check off, and then choose the category I'd like them copied to?
Or, is this already built into 1.5.0 and I just can't figure it out ??