To see what's inside, you cannot simply open part 16 on its own. You need the complete set.
: Make sure the base names are identical. If one is CGE Templates.7z.001 and another is CGE_Templates.7z.002 , the extractor won't recognize them as being part of the same set. CGE Templates.7z.016
: If you get an error saying "Unexpected end of data," you are likely missing one of the parts in the sequence. To see what's inside, you cannot simply open