You can always use regular expressions, there's a CVI library or function panel that supports the use of RE's. There are a couple of quirks to NI's implementation but they do work. With RE's you're essentially guaranteed you can find anything anywhere in a text file, but it may be a bit painful to nail down the exact expressions you'll need.
Another approach might be to use Excel under control of CVI. Excel will import/export CSV's. You could fire up Excel, import the CSV, run a macro, and export the results as another CSV, all under the control of CVI.
Yet another approach would be to use the parsing functions in the standard C library. CVI has some additional parsing functions available in one of their libraries as I recall.
I would tend to use RE's to do the job since you can always create an RE that will do exactly what you want, but there is a learning curve if you aren't familiar with them.
