Quoting Aaron Moore,
Mods still not working for the final release of Entrenchment and there is no checksum #! I really would like to get my mods over to Entrenchment soon!!!!!
I'm not sure what's not working about them. We've made some here and they work fine. What checksum # do you need?
There are many people having this problem within the modding community. Basically in my situation I have a mod named Mad Scientist that I made compatible with the beta version of entrenchment all the way up to version 0.93.006, which was right before the beta 3 release. The issue is that upon the Beta 3 release and there after, the game pretty much refuses to read any file within the mods, and I believe it may be due to the multi-mod system that was put in place for the entrenchment. It is not just with entity files, but I have place a single sound file and loaded it into entrenchment and still nothing. I have changed preexisting files such as playertech.entity and the game does not reconize any changes.
Take note, I do not even get errors on files I intentally screw up so I could test it further. The game appears to basically dismiss that there is even a mod and goes back into its default unmodded state. There are several threads in the modding forum about this very issue.
edit: should have reloaded the page before posting this one, as I now see you are on it. Thanks Blair!