Sankaku Channel/Is there a way to quickly add tags to masses of images?

For example, adding the proper studio tag to every image with relevant copyright tag, or the copyright tag to every image with a specific character tag.

Also, is there a way to automatically add tag to a wide range of images and manually remove the tag from the few that don't fit? Such as adding game_cg to every game copyright and remove, and keep off, the game_cg tag for the likely few unloaded images that are not game_cg.

This might be helpful:
http://chan.sankakucomplex.com/wiki/show?title=help%3A_tag_scripts

Also:
http://chan.sankakucomplex.com/wiki/show?title=help%3Ahome

Edit: Leave the game_cg -> cg_art thing to System please, as I mentioned in the other thread, there are better solutions for issues like that.

We are not making that sort of mass tagging widely available as it will inevitably lead to (in the most innocent case) people making big edits with the intention of correcting the outliers but never managing to complete the process and leaving no record of what was done, which is probably worse that just not having the tags in place in the first place.

Tag scripts are a reasonable compromise, or aliases and implications where appropriate.