You can match what you have with the current objectives here:
http://www.eccouncil.org/certification/exam_information/ceh_exam_312-50.aspxI don't know when the last v6 test date is, but I believe you still have about six months to take that exam. v7 just came out.
Also, it looks like they're still referencing older books, practice exams, etc., which were originally v5 materials. The exam itself didn't change much between v5 and v6, so the change to v7 may be relatively minor as well. The major differences were in the courses and official courseware.