How to format "My Passport" for Time Machine

I have purchased a 1TB Western Digital My Passport Drive (an external drive connected via USB).  How should I format this drive to use it with Time Machine?
I'm running OSX 10.6.8 on an Intel iMac (hardware circa 2005).  I have been using Time Machine for several years, rotating through external disks.  Thie new disk will replace one of the previous disks which has failed.  I have forgotten how I formatted the previous disks.  I'm primarily interested in whther to use HFS or whatnot.  As to partitioning, the format will just be one partition for the whole disk.
I'm going to see if I can figure this out using Disk Utility, but in the mean time, does anyone have recommendations?
Thanks in advance,
Frank

Drive Preparation
1. Open Disk Utility in your Utilities folder.
2. After DU loads select the WD Passport drive (entry with the mfgr.'s ID and size) 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.

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