This time, I used winzip instead of winrar, as per your advice.
You may be onto something about the problems with winrar as regards Fallout Tactics (strange, never had a problem with it before), because this time the missions did show up in the editor.
It worked! Thanks!
After...
I mistakenly posted to the sticky thread. Sorry about that.
Hopefully I'm on the right thread now.
I unpacked all the files in fallout tactics/core back into fallout tactics/core after applying patch 1.27. I did this so that the new data from the patch would also be unpacked.
You say I...
Apologies for not reading the sticky thread.
After a fresh, clean install of the game, I patched it to the 1.27 version. I then used winrar to unpack the entities_0.bos, Mis-Main_0.bos, and tiles_0.bos back into the fallout tactics/core folder, and I presume the necessary folders were...