I think 1.3 doesn't say it creates partitions(it does),but it works fine.
Thanks for the help Rick, but here's what I had to do to get it to work.
To others with a WD3200BEVT, or having similar problems as shown in my previous post.
1. When running hddhackr, ignore the error "Warning: LBA size seems to be an unsupported XBOX360 value. Please contact the authors!" I assume this is due to 1.3 being released before MS actually starting using a 320GB, so just an "Officially Supported" Xbox warning. I assume you get this if you try any drive over 250GB?
2. Hddhackr may finish without asking you to create partition 0/2/3. Contrary to rick550's advice, it did not automatically create them in my case. When I ran Xplore360 Extreme, I was told "could not find a fatx drive to open". So, I ran hddhackr again and created the partitions. A progress bar went across the screen when creating the partitions, and then hddhackr hung. Power off at that point.
3. Run Xplore360 Extreme as indicated in the tutorial. In my case, Xplore360 Extreme crashed immediately after restoring the partition. Naturally, Windows wanted to find and report the problem. I clicked "close/cancel" and powered off my computer.
I did not have any partition 3 info to restore, so I skipped that part and installed the drive in my Xbox360 4GB system. I powered up and checked the memory settings and the drive appeared as expected, but with no "saved" partition 3 data. I think it showed 293GB. I did not reformat the drive as some have suggested or needed to. I have not attempted to save anything to the drive as this is a Christmas present, so I just packed it away again.
I will post a follow up after Christmas if any issues arise.
Thanks to Insanenutter for the tutorial and Rick550 for the advice!