Fibble,thanks!I will try these as soon as posible

A little note on this game. It turns out that not only the new v1.2 release can be played without Doom II (via modern source ports like Chocolate Doom or ZDoom), but also the original v1.1 may run under DOS without Doom II installed.

Alongside the standard distribution of registered HacX v1.1, which comes in an installer that will refuse to install it without the DOS version 1.9 of Doom II, there's a plain files package what was originally made for people who have a non-DOS release of Doom II (Win95 or Mac). You can get it here:
http://gamers.org/pub/idgames/themes/hacx/hx11pack.zip

To play this version without the Doom II installation, a configuration file is required, and also the main IWAD file, which by default was supposed to be DOOM2.WAD. HacX v1.1 uses certain files from the IWAD, including the palette. This is in fact a major difference between versions 1.1 and 1.2, with the latter not requiring additional external files to work. Because of this, the HacX v1.2 IWAD can be used in lieu of the original DOOM2.WAD, it only needs to be renamed. Alternately, you can use the IWAD from Freedoom, and I think the Doom shareware episode IWAD will do fine too.*

As for the configuration file, you can use the SETUP.EXE programme from any other Doom engine game (shareware/demo versions work fine), keeping in mind that the resulting CFG file must be renamed into DEFAULT.CFG for it to be recognized by HacX.

* The game will actually accept any IWAD, including those from other shareware/demo versions of Doom engine games (Hexen, Strife etc.), with only a warning that the IWAD had been modified, but other games have different palettes and for that are not usable.

I've tried playing HacX v1.1 with the Freedoom IWAD under Boom and MBF, and it works fine, except that for some reason, regular medkits can heal the player beyond 100%, which they shouldn't do. I guess this might be somehow related to the megasphere replacement pickup which grants the player 400% health and IIRC 300% armour.

The HacX v1.2 WAD, on the contrary, didn't work with Boom/MBF at all. First off, they don't recognize it as an IWAD (although modern ports do that), and when it's launched with a Fredoom IWAD, it crashes with a "Segmentation Violation" message whenever a new game attempts to start. I wonder if the v1.2 WAD could be edited so that it would work with Boom/MBF as a stand-alone IWAD.