installing fresh copy of win 7 to another drive

I want to install a fresh copy of Win 7 on a second actually third hard drive my question is do I just run it from my present Windows installation or do I run at boot up from the BIOS?
My quandary is when in the BIOS I can't tell which drive is which? Its been a while since I did this last so any assistance is welcome!

I do not want to wipe out my present installation is my question

Always install Win7 from booted installer with all other HD's unplugged. Clean Reinstall - Factory OEM Windows 7

After install, plug back in other HD's. Set preferred OS HD as first HD to boot in BIOS setup. To boot other OS HD, tap the one-time BIOS Boot Menu key at boot.

If this isn't satisfactory, install EasyBCD to Primary OS to add others on Add OS Entry tab. EasyBCD (free Download at bottom of page - no name or email required)

You don't need to go into the BIOS to install another copy of Windows.

As you are carrying out a clean install you will be able to choose where you are going to install it to during the installation process.

http://www.sevenforums.com/tutorials/1649-clean-install-windows-7-a.html

Thank you both for the assist it appears there are more options than I realized.
Thanks again!