Request for Help

Can anyone help me install MT-Blacklist? I’ll pay you if you can make it work. I am not a techie. It’s a bit beyond my level.
My comments are being swamped with so much spam for drugs, porn, and “penis enlargement” I may have to shut down the comments altogether until I can figure out what to do about it. I would rather not. I like my comments. So do other people.
For those of you who read my comments and don’t know what I’m talking about: Most comment spammers are clever enough not to fill up space on current posts. They usually spam the older posts. Then they search Google for their own phrases, click the links, and boost the Google rankings for their own stupid “products.” I’m tired of paying for their bandwidth. Check out the second half of this comments thread and you’ll see what I mean. These spammers now make up almost ten percent of my blog traffic. It needs to stop now.
UPDATE: I got a lot of offers for help. Thanks so much everybody. I’m taken care of now.