Install the 727-100 Base pack first. After that it doesn't matter which order you do it for the 727-200 Expansion Pack and 727 Freighter Expansion Pack. I recommend that you uninstall all three before installing the latest versions.

Note: The 727-100/200/Freighter v2.4 that is downloaded via the Extended Download Service, is the complete product. You DO NOT have to have the 727-100/200/Freighter v2.3 installed on your computer before installing you v2.4 "updates".

Hope this helps.

Mark