In handling large multi-programmer (and multi programming language) projects, we need to be able to update VIs within LLB libraries. Is there a CVS patch to do this? Of course, it'd be nice to do diffs and merges, but I expect that's a very difficult task -- replacing individual VIs in an LLB would work well.
CVS does not know anything about LabVIEW's file types. Therefore, there is no way (that I am aware of) to have CVS directly update files within LLBs. With LabVIEW 8.0, you can purchase a plug-in from PushOk that lets you work with CVS from within LabVIEW (see this knowledge base - http://digital.ni.com/public.nsf/allkb/26EC5904169430CE8625706E00743997). With this integration, you can perform common source control operations on LabVIEW (and other) file types.