AterValeo: Hey Ganni: thanks so much for posting this! It worked great for me to get the game working in Linux Mint 17.2 (MATE). However, I have a few issues to report in case you are familiar with any of them (UPDATED 10/11/2015):

1. I cannot start the file via .nwn (it just hangs indefinitely), but I can start the game fine via nwmain in WINE.

2. I have all dependencies installed, but none of the *.bmu music files play in the game, only the music in the movies, sound effects (including background talking in taverns and the like), and voices.

3. I do not get any sound at all until I mute/unmute the entire system with a hotkey...

A. ...after first opening any of the *.nwm modules.
B. ...when starting the game or switching to and from the game when my main desktop resolution does not match the fullscreen resolution of the game. I have no idea why having a non-matching resolution would cause the sound not to function or be muted like that and haven't been able to find anything else on this.

OS: Linux Mint 17.2 (MATE)

The output of the instructions executed in Terminal:
keeper@SSRSNZXT ~ $ cd .wine/drive_c/Neverwinter
keeper@SSRSNZXT ~/.wine/drive_c/Neverwinter $ sudo ./fixinstall
[sudo] password for keeper:
Checking for required files

PASSED: ambient directory exists
PASSED: data directory exists
PASSED: music directory exists
PASSED: override directory exists
PASSED: miles directory exists
PASSED: nwm directory exists
PASSED: chitin.key exists
PASSED: dialog.tlk exists
PASSED: nwmain exists

Fixing case

ambient
.............................................................................................................. ...................
data
...........................................
dmvault
..
hak
..............................................................
localvault
...............................................
music
........................................................................................................
override
...........
portraits
.............................................................................................................. .............................................................................................................. .............................................................................................................. .....................
saves/000002 - Editing Sleshk
saves/000003 - Sleshk Start
saves/000005 - Sleshk Academy Attack
saves/000006 - Sleshk Prologue End
saves/000000 - quicksave
saves/000004 - Sleshk Academy Training
saves/000001 - Auto Save

Checking for problem files

Checking for permissions

PASSED: nwn.ini is writable
PASSED: nwnplayer.ini is writable
PASSED: nwncdkey.ini is writable
PASSED: saves is writable
PASSED: localvault is writable
PASSED: tempclient is writable
PASSED: dmvault is writable
PASSED: /home/keeper/.wine/drive_c/Neverwinter is writable

You are ready to run Neverwinter Nights.

keeper@SSRSNZXT ~/.wine/drive_c/Neverwinter $ sudo ./nwmovies_install.pl
NOTICE: Examining sound configuration for some clues...
NOTICE: Take this output with a grain of salt..

NOTICE: It appears none of your PCM playback devices supports
NOTICE: more than one simultaneous channel.
NOTICE: You may need to look into software mixing, via dmix, or ESD/ARTSD.
keeper@SSRSNZXT ~/.wine/drive_c/Neverwinter $ sudo ./nwn
NOTICE: NWMovies(./nwmain): Version: 20090223.080954
NOTICE: Looking up symbols in libSDL.....
NOTICE: NWMovies: Using libSDL via RTLD_NEXT.
NOTICE: SDL Library determined to be: /usr/lib/i386-linux-gnu/libSDL-1.2.so.0
NOTICE: NWMovies: SDL_WM_GrabInput() address: f74f7710
NOTICE: NWMovies: SDL_GetVideoSurface() address: f74f5c10
NOTICE: NWMovies: SDL_WM_ToggleFullScreen() address: f74f8ab0
NOTICE: NWMovies: SDL_PollEvent() address: f74d6430
NOTICE: NWMovies: SDL_WM_IconifyWindow() address: f74f8a80
NOTICE: NWMovies: Patch 0 Address: 0x08077a9d
NOTICE: NWMovies: Patch 1 Address: 0x08077ab1
NOTICE: NWMovies: Patch 2 Address: 0x0815b5f7
NOTICE: NWMovies: Patch 3 Address: 0x0815b611
NOTICE: NWMovies: Patch 4 Address: 0x0807796f
NOTICE: NWMovies: Patch 5 Address: 0x08207835
NOTICE: NWMovies: Patch 6 Address: 0x08207858
NOTICE: NWMovies: PrePatch0: 8b 80 78 02 00 00 5d c3
NOTICE: NWMovies: PrePatch1: 8b 80 7c 02 00 00 5d c3
NOTICE: NWMovies: PrePatch2: e8 68 c5 f1 ff 83 ec 08
NOTICE: NWMovies: PrePatch3: 169+: eb 59 90 83
NOTICE: NWMovies: PostPatch0: b8 00 00 00 00 90 5d c3
NOTICE: NWMovies: PostPatch1: b8 00 00 00 00 90 5d c3
NOTICE: NWMovies: PostPatch2: 90 90 90 90 90 83 ec 08
NOTICE: NWMovies: PostPatch3: 169+: 90 90 90 83
NOTICE: NWMovies: PrePatch4: 56 8d 5d e8 53
NOTICE: NWMovies: PostPatch4: e9 20 d4 6b ef
NOTICE: NWMovies: MoviesPrePatch: 6a 00 53 bf 00 00 00 3f e8 72 4f 2a 00 8b 43 60 8b 10 c7 04 24 00 00 80 3f 57 57 57 50 ff 52 44 83 c4 1c
NOTICE: NWMovies: MoviesPostPatch: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
NOTICE: NWMovies: Initialized.
Home directory not accessible: Permission denied
Home directory not accessible: Permission denied
[TERMINAL HANGS AT THIS POINT AND BECOMES UNRESPONSIVE]

BezZeMad: I've installed your patch in Fedora 23 Cinnamon Spin and everything is running with two caveats:
1. Whenever I launch the game my screen calibration is disabled and it gets very bright.
2. Running the game with primusrun (I'm on an Optimus Laptop) gives the following error:
/home/berwyn/Games/nwn/nwn: line 18: 2828 Segmentation fault (core dumped) ./nwmain $@
and the game crashes.

Any clues as to these issues?

Apart from that, the game works flawlessly, thanks for making and posting this!

P.S. For anyone on Fedora (or I assume any other 64-bit distro that uses PulseAudio), remember to install the 32-bit version of alsa-plugins-pulseaudio as well as those listed at the start.