Ensure the existing drives jumpers are set to master and the new drive to slave.
Just boot the machine and when Windows starts go
Right Click My Computer > Manage > Disk management.
You will see your new drive in the bottom pane as unallocated.
Right click on the small portion on the left hand end and choose initialise.
Then right click on the large section on the right and choose Add Partition.
Follow through the prompts and this will also allow you to format the drive.