Yeah, you want user.cfg. Where it is depends on which OS your using:
Vista/Win7 - C:\Users\YOUR USER NAME\AppData\Local\DroxOperative\User
XP - C:\Documents and Settings\YOUR USER NAME\Local Settings\Application Data\DroxOperative\User
Mac - /Users/YOUR USER NAME/Library/Application Support/DroxOperative/User
Linux - ~/.local/DroxOperative/User
I believe AppData and Library are hidden directories.
Depths of Peril, Kivi's Underworld, Din's Curse, Drox Operative, Zombasite, Din's Legacy, & Drox Operative 2