Dual-boot Ubuntu 12.04 and Windows 7 on a computer with 2 hard drives

This is the second article on dual-booting Ubuntu Desktop 12.04 with Windows 7. But while the first one, how to dual-boot Ubuntu 12.04 and Windows 7, showed how to do it on a computer with a single hard drive, this one gives a step-by-step guide on how to do it on a computer with two hard drives.