The method described in the article which you link to is for installing Linux Mint standard Live session on top of Windows, not for use with Mint4Win.
Mint4Win is for used to install Mint on top of the Windows operating system without re-partitioning, but in a method in which you can make persistent changes to the Mint install. Because Mint4Win is installed on top of Windows NTFS file system, it can be un-installed with Windows' Control Panel Add/Remove Programs controls, and can be damaged or wiped out by Windows utilities, bugs, or viruses. Because of this, it is a method for testing Mint, but is not a preferred method of installing Mint for the long term. Mint4Win does not require the linked method, it is fully capable of installing on top of Windows without damaging your Windows install.
LMDE Mate 64-bit, LM17 Mate 64-bit
Debian Xfce 64-bit, Xubuntu 14.10 64-bit, Xubuntu 14.04 64-bit, Antergos Xfce 64-bit, PCLinuxOS LXDE 64-bit