Upgrade a hard drive in GX-280

What do I need to know so that I can add a second h/d to my system?

I want to install a 1 TB SATA second hard drive

Will windows see the whole new drive, or will I have to partion it?

Is this version of bios ok?

Please help, and thanks for any....George

Current spec's

OS Name Microsoft Windows 7 Home Premium
Version 6.1.7601 Service Pack 1 Build 7601
Other OS Description  Not Available
OS Manufacturer Microsoft Corporation
System Name XXXXXXXXXXXXXXXX
System Model OptiPlex GX280
System Type X86-based PC
Processor Intel(R) Pentium(R) 4 CPU 3.00GHz, 2992 Mhz, 1 Core(s), 2 Logical Processor(s)
BIOS Version/Date Dell Inc. A08, 3/3/2006
SMBIOS Version 2.3
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "6.1.7601.17514"
User Name XXXXXXXXXXXXXXXXXXXXX
Time Zone Eastern Daylight Time
Installed Physical Memory (RAM) 4.00 GB
Total Physical Memory 2.99 GB
Available Physical Memory 1.22 GB
Total Virtual Memory 5.98 GB
Available Virtual Memory 4.17 GB
Page File Space 2.99 GB
Page File C:\pagefile.sys