What four files are you talking about? maybe I'm confused about that. When I extracted the download it came with: add-ons, platforms, tools, sdk manager, and sdk readme. I put those four files in tools, but I'm still getting the same message.
The four files from the droid root archive...they are:
- Busybox
- su
- superuser.apk
- rageagainstthecage-am5.bin
Extract those from the droid2root.rar archive and copy them into your /android/tools directory, then follow the instructions, running all your adb commands from the android/tools directory
This is assuming you installed the SDK to /Android.