You can enable or disable special features of Arsunt's patch with the files on the corresponding folders. Features are:

- Widescreen Field Of View.
- Waving inventory background.
- PS1 colored bars for health and oxigen.
- PS1 Text box style.
- Extended view distance.

To activate just double click and press yes when asked by Windows. If that doesn't work, then open the files with regedit.
There's nothing malicious in the files, you can inspect them if you want with a text editor. ;)