Heh, just found this out don't know if its old or not but w/e.
When you try and edit a Slaughterhouse, there are two files that say this:
MORDOR_SLAUGHTERHOUSE_BUILDCOST
MORDOR_SLAUGHTERHOUSE_BUILDTIME
While I normally delete these and replace them with a number, I've found a way to keep the code a bit cleaner and similar and so that when you edit multiple structure and units files you can just go back to the same place.
Instead of deleting them, copy and paste the names into a notepad document, now go to the file gamedata.ini and hit Control+F, type the name of the unit/structure. Try to keep it in one word (eg Cntrl+F the word Slaughter house won't work, you Cntrl+F SLAUGHTERHOUSE although this may differ on the unit, not sure). Now you see all the files that you saw back in the slaughterhouse.ini file. You can edit all of the files here, and when you want to change multiple buildings and etc, just come here and modify damages and costs and buildtimes instead of scrying through tons of files.
Don't know if this is old, but I found it interesting.
Victor von Doom
Winner of the Boromir Award