I wabt those screens gone too! I've set the Centrafuse splast screen as desktop background, black background color in the logon window, the boot screen will be changed soon, all i need now is to remove those dialog boxes during logon.
This can be achieved by installing minlogon, but i was unable to config and run centrafuse after applying minlogon. Couldn't figure out why.. Maybe I have to apply minlogon first, and then install Centrafuse as SYSTEM user?
Is it possible to remove those dialog boxes and still use the standard winlogon.exe?