This sounds like a good place to start learning basic regex usage.

See: perlrequick and keep in mind that you won't have to use any of the fancy stuff for this or even the intermediate stuff.

You'll be matching and substituting your keywords in no time. Just be sure to keep a copy of the original name before you start changing it, so you can do the rename.

PS: glob may also be useful if you haven't determined the list of files to work on yet.