There are several "LG R470" series so you're going to have to be very specific.
R470-G.AR19E -
http://www.lg.com/jo_en/support/product/support-product-profile.jsp?customerModelCode=R470-G.AR19E&matchedModelCode=&searchEngineModelCode=R470-G.AR19E&initialTab=warranty&targetPage=support-product-profile
R470-G.AFA4BZ -
http://www.lg.com/za/support/product/support-product-profile.jsp?customerModelCode=R470-G.AFA4BZ&matchedModelCode=NOT_MATCHED&searchEngineModelCode=R470-G.AFA4BZ&initialTab=warranty&targetPage=support-product-profile
R470 selector -
http://www.lg.com/ae/support/common/support-model-browser.jsp?Ne=8373&N=8167+4294967168+4294967138&resultType=warranty&targetPage=support-product-profile
As I mentioned, you'll need all the correct Windows 7 drivers and wherever possible the Windows 7 x64 drivers.
Honestly, installing a fresh version of Windows 7 x64 on a Notebook is often very complex. If I had to do it then I would only do it on a customized Flash Drive installation or create a customized DVD -- both with all of the drivers needed and uncompressed just in case you need to (F6) Load a Driver so the Windows installer can work correctly.
Further, keep in mind that I would completely reformat i.e. wipe-clean the HDD's contents. Therefore, BACKUP all Documents, Video, Music, email (PST/OST) files, etc. -- you name it to either a Flash Drive, backup HDD, DVD, etc.
BIOS - if there's a new version then install to the latest BIOS available.
Create a Customized Windows 7 Flash Drive:
1. Create a bootable Flash Drive with OS -
http://www.youtube.com/watch?v=H4CdEZPTPzk
/General information -
http://www.overclock.net/t/1156654/seans-windows-7-install-optimization-guide-for-ssds-hdds
2. Download and unzip ALL needed drivers, place in a folder called "DRIVERS_R470" and place all of the drivers uncompressed in the new folder. Chances are you won't need any of them until the installation is complete,but they're there in case the Windows installer requires them. If Windows 7 does then you'll need to manually select the appropriate drivers from the folder DRIVERS_R470.
3. After Widows 7 x64 is finished simply drag and copy DRIVERS_R470 folder to the desktop. Install the Chipset drivers, followed by the LAN, Wireless, etc and install all of the drivers and software. If a driver requests you to reboot then reboot and continue.
4. Install all of your Applications and then restore your ... Documents, Video, Music, email (PST/OST) files, etc.