The Third Dynasty was an unusual time in Egypt's history. For close to one hundred years peace was maintained by trade. Thus allowing more pyramids to be built in this dynasty than all other dynasties combined.
Any download before today 1-4-08 needs to download Huni 5 and stop the campaign at the beginning of scenairo 5 and play the stand alone scenairo. The end game will be the same. Any downloads aftr 1-4 08 does not need the stand alone scenario, as the file has been fixed.