Two internal drives, one with Lion, second with snow leopard. Can you do it?

I have a 2007 17" MacBook Pro with two internal drives. The first drive is the Startup Disk with 10.7x Lion.
Question? Can I make the 2nd internal drive a Startup disk? I want to install Snow Leopard 10.6x. I have way too many pluins that don’t work with Lion.

Get yourself a USB flash drive at least 8 GBs. On the computer that has a DVD drive do this:
Drive Preparation
1. Open Disk Utility in your Utilities folder.
2. After DU loads select the plugged in USB flash drive from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
7. Insert the Snow Leopard DVD into the optical drive.
  1. Select the USB flash drive from the left side list.
  2. Click on the Restore tab in the DU main window.
  3. Select the USB flash drive from the left side list and drag it to the Destination
      entry field.
  4. Select the mounted Snow Leopard drive icon from the Desktop and drag it to
      the Source entry field.
  5. Double-check you got it right, then click on the Restore button.
Destination means the USB flash drive. Source means the Snow Leopard drive icon on the Desktop..

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