Not
Sorry for hijacking your thread.
Yes, please post some error messages and maybe also some info about the changes you made...
Not a problem!
I went through the following steps:
1) Backed up DATA.TRE as recommended.
2) Unzipped the contents of ARMEDIT into the Armada root folder (this was an assumption on my part, the instructions are unclear).
3) Opened DOSBox and ran INSTALL.BAT from there. It executes, and shows something along the lines of "257 items to unpack", but I am not sure whether this completes successfully. The window stops responding and never goes back to command prompt. I manually closed this.
4) Running ARMEDIT.exe works fine, and I can make changes to DATA.TRE and save them, with a "Success!!" message (actually several of them) displayed afterwards.
5) Running the game however results in a crash, with some hex error codes and a "Program halted" message. I will post a screenshot later.
I started small on the changes; All I tried for starters was to change the DF missiles on the Arrow to IR's by changing the weapon ID from 0 to 2.
Anything I may have missed or did wrong?