[Sailor Steve]

In answer to your original question, yes, the readme is just a readme. That particular message just means that it will replace the "All Weather Guns" readme with the "Spy Sat" readme. Since you can't read the readmes in-game anyway it shouldn't be a problem.

With some mods the changes make a difference, and you need to decide which is more important to you, but you can also feel free to ask about those as well. The nice part about JSGME is that it asks at all, and lets you decide what to do.

One of the changes made by many mods is to the Commands.cfg file. I keep one set up the way I like in a special folder, and after adding any mods I always reinstall that file directly to the game, so the key commands are always just the way I like them.