So I'm making (have made, really) a mod for the Mauser to make it less of a useless collector's item, and everything's going swimmingly - except for the part where I turned it into a whole other gun, which necessitates editing the description in the pro_item.msg file. I know the easy way to ensure compatibility is to simply make versions that replace the base Fallout 2 pro_item.msg, the RPU one, and the Megamod one, but I'm a masochist and would like to distribute a package that actually goes in, looks for the file, then changes the strings in it. One thing going for me is that msg files appear just to be plain text, but on the other hand I've read stuff about everything in /data having to be set to read-only, so that could be an issue. So, at long last, here's my question: how the hell do I do this? Or should I just make 3 versions?