Well all files you really need are the maps/world/base/map.rwm file, the maps/world/base/imperial_campaign folder and text/imperial_campaign_region_and_settlement_names.txt, all in all not more than a few mb of size, so it doesn't take too much hd space... You can delete some videos to compensate, who needs videos anyways :P

Anyways, I probably won't bother to write a .txt to .strings.bin converter, because the mod folder is supposed to work properly in 1.2, so using file_first should become obsolete (and I won't do anything to stop that )