[BlindHandyMan] Changing a CD drive to a DVD.

[Agent086b]

Hello all,
I am having a bit of a brain fade.
I wish to pull out my CD drive and put in a DVD one. I have put in a CD 
drive before but I have forgotten to get the old one out.
I know to disconnect the cables, there is one screw in the side of the 
CD drive that I can remove.
Is there any thing else holding that drive in? If I pull it out does it 
come out the front or do I slide the drive towards the rear of the case?
I think it is an IDE drive.
Thanks for any help here.
Max.