Are you talking about the KingmakerSetup.exe?

If you are that shouldn't be limited to the C drive, I think that uses the registry to find the games install location and then installs into that location, if it's failing it's probably because it can't find the registry entry, most likely because it's missing.

Reinstalling the game should add the registry entries it's looking for, or you could add them manually.

Adding them manually won't be hard with some help, however you neglected to give information about your operating system or the install path. Whenever asking for help you should always give some system info. Since I don't know this about your system you'll have to do a little extra on your side.

Anyway, if you want to try adding the registry entries manually here goes, this will be different for 32bit and 64bit systems.

If you have 32bit copy everything between the following lines and save it in a text document, now because I don't know the install path you're going to have to change it yourself, in this the install path is set to "F:\Games\Neverwinter Nights" so edit it to match your actual install path, just take note of the double \\ instead of using only 1 \ and the second path entry ends in \\ while the first does not.

Once you've corrected the install path and saved the text document then rename it from .txt to .reg, then double click it and it will ask if you want to import it into the registry, click yes and try to install KingmakerSetup.exe again.

Here's the entries for 32bit
____________________
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\BioWare\NWN\Neverwinter]
"Location"="F:\\Games\\Neverwinter Nights"
"GUID"="{7C503E58-B2BC-11D5-978A-0050BA84F5F7}"
"Version"="1.69"
"Language"=dword:00000000
"Path"="F:\\Games\\Neverwinter Nights\\"
____________________

Here's the entries for 64bit
____________________
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\BioWare\NWN\Neverwinter]
"Location"="F:\\Games\\Neverwinter Nights"
"GUID"="{7C503E58-B2BC-11D5-978A-0050BA84F5F7}"
"Version"="1.69"
"Language"=dword:00000000
"Path"="F:\\Games\\Neverwinter Nights\\"
____________________

Remember, only copy what's between the lines, do not copy the lines themselves.

Sorry, I didn't think about the system information. For the record, it's windows 7 ultimate 64-bit. But anyhow, I managed to create a registry file using the specifications that you mentioned, rewriting the parts so I got a file that says:
-----------------------------------------
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\BioWare\NWN\Neverwinter]
"Location"="Q:\\GOG Games\\Neverwinter Nights Diamond Edition"
"GUID"="{7C503E58-B2BC-11D5-978A-0050BA84F5F7}"
"Version"="1.69"
"Language"=dword:00000000
"Path"="Q:\\GOG Games\\Neverwinter Nights Diamond Edition\\"
--------------------------------------
But when I try to add it to the registry database, it comes up with a message saying that the specified file is not a registry script. Any idea as to what might have gone wrong? I just called the file itself "nwnregistry.reg" and the computer does acknowledge it as a registry file-type with the .reg, but it appears to have problems actually reading it.

Wow, sorry for the very late reply, though I didn't get any kind of notification about your post and just stumbled back in here by chance.

You've probably sorted it by now, years ago lol, but figured I'd reply anyway incase it helps someone.


Sorry I made a silly mistake with the registry information, it's missing a line to say it's a regedit file. Basically the first line of text should be "Windows Registry Editor Version 5.00"

So it looks like the following between the lines.

____________________
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\BioWare\NWN\Neverwinter]
"Location"="F:\\Games\\Neverwinter Nights"
"GUID"="{7C503E58-B2BC-11D5-978A-0050BA84F5F7}"
"Version"="1.69"
"Language"=dword:00000000
"Path"="F:\\Games\\Neverwinter Nights\\"
____________________

I'll edit my post aswell.