I have that same exact case. The drives are all tool-less, and make sure that you slide the CD drives in with the front panel on the computer, or else it will not fit. Also, be prepared to use a little bit of force to get the hard drive in. Other then that, it's a nice case.

Yup, no use for any screws to install drives. You don't need any screws to install pci cards either, although you can if you want to (I opted to use screws for the videocard). The brackets can be easily removed or reattached using the same system. I had to use a bit of force yes, but it all went pretty smoothly.