Voici la réponse de ce site Introduction Rulesets Fantasy Grounds
Voilip j'ai mis les portraits de vos personnagesCreating the ruleset folder
The first step in creating a new ruleset is to create a folder for placing the ruleset files. The name of the folder is simultaeously the name of the ruleset, and should be unique. If you are making modifications to an existing ruleset, or creating a modified version of game rules defined elsewhere, it might be a good idea to add a personal bit to the ruleset name to avoid confusion with any other potential rulesets.
First, you should locate the application data folder. You should have a shortcut to it in the Fantasy Grounds start menu group. If you are looking for it in the file system, it is typically at:
C:\Users and Settings\[Account name]\Application Data\Fantasy Grounds II (Windows XP)
C:\Users\[Account name]\Application Data\Roaming\Fantasy Grounds II (Windows Vista)
C:\Users\[Account name]\AppData\Roaming\Fantasy Grounds II (Windows 7)