The hard drive rails will have to be drilled out.. They are mounted my pressure Rivets. You can put your small drill bit in the center of the Rivet and then start to drill slowly on the bottom first. Then there is a screw or a rivet at the top plugged into the 5 1/4 Bays. They hide them so look carefully. Then make sure you will never need to change the front fan without a complete overhaul and make a template that you can use with the original rivet holes and make new ones about an inch closer to the front. The top you should be able to double side tape that if you can't get a rivet tool to it.
Alright never mind, that sounded like a completely new language to me. LOL!