Easy for you to say... The instructions you linked say "right click on the ultimate boot ISO and select extract files...." but right-clicking gives me no such option. That was my sticking point, I just don't know how to add something into an already-compiled ISO.

I did find an ISO that already had WDidle3 built into it, and was finally able to run the program. However, in addition to the pair of 2-TB "Green" drives, the WDidle3 program also set my 1-TB "Caviar Black" drive to 30 seconds before parking, which I hadn't intended to do. Thinking about it, I don't think that will affect me, that 1-TB drive is not a system drive, just a data backup drive and when it is accessed it is doing gigabyte transfers. If it turns out to be a problem, I'll just unplug it and then run the WDidle3 program again.

tanstaafl.