I need to get inside my acer Aspire z5600 to replace the hard drive, but it has beaten, can anybody out there help with this problem?

This is easier shown than described, so I refer you to Acer's service manual. The only freely accessible online source I've found for it is Acer Z5600 Service Manual. Disassembly instructions start on page 33. Hard drive removal starts on page 45.

Consider replacing the drive with a SSD if it fits your budget and capacity requirements.