Installing chrome OS in a different way

I downloaded the Chrome OS from chromeos.hexxeh.net and I want to install it in a different partition but I don’t want to delete all my files in the laptop and I can’t save all the files in the external hdd (its over 200gb). Question is how do I make Chrome OS detect my secondary partition and install it there instead of my first and primary partition(where Windows 7 is installed)? the 2nd partition is formatted and everything i just want to install it there so I don’t have to plug the slow USB Chrome OS again everytime
Here’s what I do but there is nothing I can find in Google that it will let me install in the other partition

http://chromestory.com/2010/09/how-to-install-chromium-os-on-your-netbooks-hard-drive/
-Boot from Pen drive and Log on to Chrome OS.
-Press Ctrl+Alt+T.
-If your build is Flow : Type /usr/sbin/chromeos-install and press Enter. ( other builds, the command is just “install” without quotes.
-Enter the Root password ( facepunch if you are using flow or vanilla and for the dell build, dell1234)
-Follow prompts. ( couple of them, dont worry !)
-Unplug the USB Pen drive and reboot the Computer.
Done.
Answer #1
There is a lot of ways. You simples need to search for “DUAL BOOT chrome OS” in google. BUT I should advise you that I think is better to you just install it in a Virtual machine. Because isnt a system that you can use everyday and once you install it in dual boot is harldy removeble. Soooo I think you should first use it in a Virtal Machine ORRRRR install it in a USB flashdrive pen.