I played Ghost Master once again some time ago. I decided to finally get the mod installer, that I had begun with a hell load of time ago done. In fact it's not a real installer, but more of a switch, to switch the Mod ON and OFF with. Here is the link:
www.file-upload.net/download-4741442/Mod-Installer.zip.html And here's how to use it:
-Usually some Ghost Master files are set to read-only. If they are you can't use the installer(if you do it will mess up your game pretty badly). The easiest way to change that is to right click on your Ghost Master folder and then click properties. Then there will apear a window. At the bottom of the Window there is a box where you can turn read only off. When windows then asks you if you want to disable read-only for all files which are in your Ghost Master folder, just say yes.
-If you have done that you can directly start the installer.
-First you gotta click on browse and finde your Ghost Master folder.
-To Switch the mod on or off just click the button and wait

-The last thing to mention is: if you wanna switch the menue just click on one of the menues and then click on "Change Menue Type" and wait.
It isn't realy much more. It's designed to be handy.
When you switch the mod on, the installer will create a "Unused Ghosts Mod.exe" in your Ghost Data folder. always use that if you wanna play the Mod! When the mod is switched off just use your old exe. I recomend to install the Bonus scenario and the AllGhosts mod. I don't know if the mod will work without them. But they are very enjoyable

. The mod only comes with english text, so switch it. I got a german translation for myself, but I don't realy think its needed

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The last thing to mention is that when you free a ghost the game will create the ghost with its powers in the savegame. Since the original ghosts and the moded ghosts have different powers you should only play games that you started with mod, with mod and games that you started without mod, without the mod. If you forget to switch, the game shouldn't crash or anything like this, but there can happen weird things with the powers and I don't recomd to do it.
Oh and as i promissed everyone who was a great help is in the Credits. Hope I don't forgot someone

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Edit: Of course you should deinstall the mod if you have it installed before you use the installer.
Edit: Another realy important thing to noticeis, that you have to launch this program as Admin or at least have all rights for the Ghost Master folder and the documents, that it contains.