To make the screensavers I have used a French programm, so I am afraid the screensavers are in French too. But when you closely follow the manual it should be no problem to install the screensavers (and to remove them if you want to).
To install the screensaver just click on the button "Installer". Once you have done that you get a second screen where you click OK.
It is possible that you want to remove one or more of the screensavers. To do that follow these steps:
- Go to the Explorer (Microsoft).
- Double click on a screensaver.
- Instead of "Installer" you click on "Effacer" (Remove).
- Select the screensaver you want to remove.

Select the screensaver you want to remove.

The message indicating that the screensaver has been removed.
Note: once you remove a screensaver it is deleted from your computer unless you have saved the download somewhere.