Thank you.

I can confirm that patch removes the DRM from Mysteries of Westgate. At least for me. :)

You do realize what an installer is doing, right?

Extracting and copying files from a compressed archive.

Ever used WinZip or 7zip or WinRAR? That's what an installer is. Most commercial installers even use the exact same compression and extraction algorithms as them.

When you install a game, you are extracting files to folders on your hard drive, and writing registry entries.

When you patch a game, you are extracting files to folders on your hard drive, and writing registry entries.

The two processes are identical. The files included will be identical. The only difference is a patch will overwrite the old files with new ones, and in some cases will modify existing files (like a configuration settings file being changed to have new settings applied).

In other words, there is absolutely no functional difference between a patch and updated installer, other than convenience. One is not "safer" or "more trustworthy" than the other.

Just saying, you're delusional. :D

Awesome! Now I just need to scrape together fifteen bucks.

I wouldn't give up the wife and son for anything, but money sure gets tight in a hurry. :-\

You are incorrect. A clean and basic installer works as you described, but some bloaty installers like microsoft installer have many more steps and complications involved in them.
This allows them to do things such as install drivers, run software, connect to the internet to download files or authentications, and so on.

Some really invasive DRM actally uses rootkits and otherwise compromises the OS. However, AFAIK the GOG installer does not even posses the ability to implement such DRM measures (although, it could of course be modified to add the capability; I doubt gog will do so).
It is however possible for the game to install said obtrusive DRM on its own on first launch... Although AFAIK NWN2 does not have such DRM nor does it install anything on first launch.

For someone who is not exceptionally familiar with the particulars of the DRM scheme on this specific game, its not unreasonable to play it safe like he is.