This is for VkDoom (and maybe a future GZDoom release), so that is with lightmaps. They interact with 2-sided textures and 0-height 3d floors as you would expect when the lighting is set up right.
Maybe this older version of WhackEd2 works for you? https://www.doomworld.com/idgames/utils/exe_edit/whacked2
Older releases of WhackEd4 are still available on https://github.com/GitExl/WhackEd4/releases, some of those might work on XP.