I think i installed it with the cios installer and now i do not know how to uninstall it cuz i heard it can brick your wii.
If you want to remove it Check out Ithian's guide " How to remove cIOSCORP from your Wii console" over in the guides section.
Are you sure you aren't just talking about installing a cIOS with say cIOS38 rev 17 Installer? Just checking...
Damn I suck!!!!