Disclaimer: I was not the one who created the mod featured here, I am merely spreading word of it's existance that, yes, even games this old have people that love them enough to mod it.

A total of four ghosts were cut from the game and now, thanks to the modders of the website I'm about to link you, they are yours!

This mod adds Azrael, Smokin' Joe, Thorne, Soulscreech.

Download[mega.nz]

Edit: Link was blocked. Here it is, but remove the space after mega : https://mega .nz/#!AYQ0CTzK!jw_hAFwsbIlCN9hkO7v_2hSUsVAWh2cnBZgEOCL5654

Choose GhostData as installation folder.

Installator replace files:
levels/Ghoulroom/ghoulroom.bsp
SCENARIOS/GHOULROOM/gamedata.bsp
ui/azrael.tga
ui/azrael_b.tga
text/English.ut8
and add:
RejectedGhosts.exe
GhostMasterLauncher.exe

You have to start new game for make ghosts work!

Rejected Ghosts works only with GhostMasterLauncher!!!!

http://ghostmaster.proboards.com/thread/3013/ghost-master-rejected-ghosts-mod

Please note, as stated on the website you can only run the modified .exe that comes in the package on the website, you cannot use them in the normal .exe that is launched via Steam.

Note: The images were the best as I could find. since this uses a unique launcher I couldn't gain the images myself so I had to go hunting for some.