There is just one problem. The faceplate may have to be chizzled down and crazy glued. I ve done it many times before. All you are doing is transplanting the rail kit and faceplate from your old drive to the new. Faceplate may be the dificult part but crazy glue and chizzle will fix that if youa re handy. But there is a good chance the faceplate can snap right in. You wont know till you get the new drive.
The front plate of the optical drive. You may not need it, but it's nice to have in order to keep the flushed with the rest on the body of the unit. Sometimes (rarely) you'll find that the included drive's plate may not open/close properly due to it's size. It's best to get an optical drive with your barebone. So you know it'll fit & work properly.
I believe he is talking about the z80k. That unit comes with a built in drive that is not exactly modular. He is trying to mod it to be a dvd/rw instead of the base combodrive. Its a fairly easy job but you want to keep the new drive from the same manufacturer so the faceplates an transplant easy.
Sorry, didn't understand. Did you say that you've got a pioneer drive & fits into the modular bay? If it does, everyone'll praise you because many would die for a slot loading drive. I know Pioneer has slot loading desktop drives, but didn't know they had a slim one.