The IVI Shared Components are not NI specific but are distributed by the IVI Foundation. This KnowledgeBase should help clarify a little bit.
http://digital.ni.com/public.nsf/websearch/5FAC92110A45875F86256D180057F075?OpenDocument
There is also a link to the IVI foundation website that has a clean-up utility that might help out.
Best Regards,
Jeremy R.
NI - Applications Engineer