Note: this applies only to vanilla game, not full LW2 mod.

Step 1: Subscribe to both mods. The order in which you do it (ie. the default load order) does not matter

Step 2: go to Toolbox's XComEngine.ini (located in STEAM_DIR\steamapps\workshop\content\268500\674832831\Config) and comment out (put ; as first thing on line) the following line:


(you can also comment out the one that says UIPersonnel_SquadSelect in case you are using alternative mod launcher to prevent its complains - but it isn't required to make these mods work together)

Step 3: Go one folder up and remove Content\CIN_PreMission.umap file

Alternatively, you can rename it to something the game doesn't recognize (eg. I named it CIN_PreMission.umap_REMOVED_FOR_ROBOJUMPER_SQUAD_SELECT)

That's it! you should be able now to use robojumper's Squad Select and all other LW toolbox functionality - mod menus, red fog, camera rotation option, etc. Note that you will not be able to use combat auto-resolve since it's a button on squad select screen

P.S. Big thanks to @robojumper for guiding me though this process