I am in the process of debugging a utility that will almost automatically update mods from entrenchment 1.02 to 1.03, and I have most of the mods for entrenchment 1.02 to test the utility upon,
the most important question is did you extract the folders from the archives?
if not then I suggest downloading 7zip or winrar, my preference is 7zip as it is free and is used by some of the mods as it produces a smaller archive, and can also work with the rar & zip formats as well
there is a subtle difference in planets,ships, & structures between 1.02 & 1.03 adding a rendershield true line after the sheildmesh line
this difference DOES cause CTD when running a 1.02 mod in 1.03
if you could tell us which mods you were trying to use we can advise the best answers foreach of the mods