Those are torx screws, you should be able to get a driver that will fit it at most hardware stores. I think it's a T6, but could also have some T5 screws in there, not sure as I haven't taken it apart. Most stores sell a small kit for under $10 that should get you what you need.
Also to get a screen, or perhaps send to them to see if it is the screen that is bad you could check this business out: Your Blackberry Parts and Repair Service Center
I have no previous experience with them, but they do sell curve LCDs if need be and also offer repair services. Screen repair done by them for $145 is still cheaper then a new device.
Let us know what happens