RTB_registerPref("???","???","???","???","???","???",?,?);
1. Pref Name2. Category3. Variable Name4. Variable Type (list text value text value, bool, int min max, string max)5. Add-on name6. Default Value7. Requires restart (bool 1 or 0)8. Host only (bool)9. Callback NameSource: http://www.returntoblockland.com/files/RTB_Documentation.pdfYou should probably read that.