@Sword -- yes save it as WinRAR...it will actually save as a .iso file but WinRAR seems to be your default program for opening .iso files hence the reason it is been recognized as a WinRAR file.
@Melchizedek -- you basically need to follow any of the tutorials for installing a cIOS, however is you check my site you will find a cIOS Read Retry file near the top of the page just run that through the HBC. and then WiiDumper should recognize the cIOS is installed and away you go, any trouble with WiiDumper, just read this thread over...this guys been near enough hand fed instructions, good job am in a good mood.