Doom MODS: Confused about Aliens TC, Chex Quest and Hacx

[Zup]

So I've been able to run some mods on lr-prboom, but I'm confused with these three games.

Hacx: HACX.WAD seems to be a IWAD file, but if I try to run it as an independent game it doesn't run. If I launch it as a mod but using DOOM2.WAD as main wad file (=launching DOOM2.WAD and including HACX.WAD on the prboom.cfg file) it works fine. Is not a problem because it works, but I don't know why it behaves that way.

Chex Quest: It seems to be a PWAD file. If I run it as an independent game, the menus are shown fine but there are mising textures everywhere. If it is launched as a mod using DOOM.WAD as main wad, it seems to work fine but the menus are a mix of original Doom and Chex Quest ones. Can it be run with "pure" Chex Quest menus and without missing textures?

Aliens TC: This total conversion uses the original DOOM.WAD, plus three other wad files and a BEX patch file. I've placed all files on prboom.cfg but the lr-prboom seems to load only up to two wad and two HED/BEX files. prboom in Windows seems to have the same limit, but if I launch the game listing all files on the command line it works fine. How can I launch a game with more than two wads in lr-prboom?

Thanks.