The community of talented programmers, artists, and enthusiasts took the EECH source code and ran with it. I’d point you to the SimHQ article referenced previously for detailed information about the modding process and the great strides the modding community has made over the years with EECH. So forgive me while we do a bit of flipping back and forth from this point forward between the heavily modded EECH and this newest product in the series: EE2.
Now, what you’ve been waiting for (finally!). My review copy of EE2 arrived about a week ago wrapped in its retail box. The game still ships on a single CD-ROM and the package contents include the disc, a brief 10-page leaflet that has some basic setup and gameplay information, a fold-out paper keyboard guide, and a flyer that allows you to send away for your free DVD documentary titled “21st Century War Machines”. Included on the CD are three PDF files. The first is the 36-page “Guide to Attack Helicopters” which is interesting in both its content and format. The authors riddled the PDF file with hyperlinks within the text that will take you to various Wikipedia citations that are actually quite useful. The second PDF is the “Short User Guide” (I’m 6’ 2”, so I wasn’t sure if this was the right one for me) which is basically a replica of the paper leaflet that is included with the package.