Parallels : Change 64GB Default Harddisk when Installing OS X as VM

In Parallels Desktop, do the following :

1. Create a new virtual machine using "Install Windows or another OS from a DVD or image file", click Continue
2. Select Mac OS X, click "Customize settings before installation",
3. Set the name and location of the VM, click Continue 
4. Click Hardware, Hard Disk 1, click the [-] button to remove the hard disk 
5. Click "Move to Trash" 
6. Click [+], select Hard Disk, Type: Existing image file, choose file path of the new .hdd file. Or create a new image file
7. Select a new image file and resize the file system that you want!

Easy, right ?