Did you run the repair utility after you deleted the files?
Where is that located? After I deleted the files, I tried to run wc3. I was told that it would run the repair utility when I tried to launch Wc3. This didn't happen, however, and instead it asks me to insert my Wc3 Disc. I don't have a Wc3 disc, I downloaded the installer from Battle.net.
About the raid-0:
I have actually noticed a non-negligible amount of performance increase by running it in Raid-0 (I did compare results by running windows and my games on a single drive and then reinstalling in Raid-0, though I didn't use timers or anything, so my results aren't concrete).