you can play the expansions with the latest only, unless you have an archive of the version you want,
BUT,
there is a mod updater that was designed to update mods from a previous version mod folder to the latest version so that the mods can still be played in the current patch version, you just have to place the mod in the correct version mod folder
and another thought is that I did do an updated real capitals for entrenchment, and you can download it here
harpo