Character (role) and game data is stored in gamedbd/data or path similar set in gamedbd/gamesys.conf. Simplest method to access is in v1.5.3+ via command prompt...
Navigate to gamedbd by :
cd /home/gamedbd
List all commands by :
./gamedbd gamesys.conf ?
Export role by :
./gamedbd gamesys.conf exportrole 1024 > /root/1024.xml
Make your changes to the 1024.xml, then import by :
./gamedbd gamesys.conf importrole /root/1024.xml
Make several copies before you break something...
The role will have to be logged in at least once before exportrole will work...
If gamedbd doesn't support importrole, you'll need to use pwadmin or something similar...