Hi, James. Okay, let's quit the wild goose chase (sdelete). I'm willing to bet that you'll find a proper DOS utility to do what you need right here. Read the info on the various utilities. My guess is that Nuke 1.11 is what you want now that you're without Windows on that partition.
I'm sorry for the mixup. I guess you can expect an old guy like me to drop the ball once-in-a-while. I'm so used to using sdelete from within WinXP and Win2K for erasing particular sets of files or directory structures that it was the first thing that popped into my alleged mind.
If you run into other issues you should probably post them as new threads. The mods here at Anandtech usually frown on threads that hop from one topic to another. Makes it too hard for people to figure out what's going on, as you can see from a post a couple up from this one. If the threads pretty much stick to one topic per thread then it's also easier for people to use the forum's search capabilities to locate pertinent information.
If you need to talk with me, of course, you can always send me a private message using the forum's utility for that purpose.
Regards,
Collin