Directx Eradicator 1.09

I had a problem with uninstallation of dx9c.
Some people suggested me the use of this utility: eradicator.
Some of you had experience with it? In the site of download is written that it needs to be considered as last chance, since is very 'delicate 'operation.
thank you for suggestions

i tried it, but we didnt have the windows xp cd on hand, so we had to stop before we did anything.