This was brought up a few years ago:
https://www.theblitz.club/message_boards...t=Long+WAr
The Long War v2.1's README file says this: "Extract to drive where TLW mod is installed (eg: C:\). Ensure "Use Folder Names" option is checked."
It's been a long time since I've installed this game. I made a copy of the SAW folder so I didn't have to re-install it, then ran the self-installer for LW. It over-writes the PW folder and it *should* be good to go. I'll take a look at my setup when I get home...