these are some useful file info...
C:\System\System.ini Preferences for the Shell/ System. Stores preferences such as zoom ratio.
C:\System\apps\Agenda\Agenda.ini Preferences for the Agenda Program
C:\System\apps\Ctrlpanl\Ctrlpanl.ini Preferences and Storage of what is in the Control Panel.
C:\System\apps\extras\extras.ini Stores names of icons / programs in Extras Group.
C:\System\apps\home\home.ini Stores names of icons / programs in Desk Group.
C:\System\apps\office\office.ini Stores names of icons / programs in Office Group. This continues for internet etc.
C:\System\apps\home\extraicons.mbm Extra icons for use with shortcuts etc.
C:\System\apps\Timew\Timew.ini Preferences for Time. Important if alarms set in Time
C:\System\Data\Bookmarks Web Browser Bookmarks
C:\System\Data\smssegst.dat, C:\System\Data\smsreast.dat, C:\System\Data\Cdbv2.dat, C:\System\Schedules\Schedules.dat,\System\Mail\*.* Files to be backed up for SMS and e-mail. The first sent message list for SMS, the second the received message list for SMS, the third a SMS and email database, the fourth a schedule log for SMS and email. The last which may be on C or D drives is the store of the actual messages. All files from this folder and it subfolder should be backed up and directory structure maintained.
C:\System\Data\Contacts.cdb The Contacts Database. If you have moved it to the Memory Card you will find it on the D Drive.
C:\System\Data\Logbu.dat The log file, stores a record of outgoing and incoming messages, calls etc.
C:\System\Data\dbProfile.db,C:\System\Data\syssnd.dat According to aikon.ch, these files will back up Profiles settings.
C:\System\Data\wap\Wapbookmark WAP Book Mark file.
C:\System\Data\User.dic Custom Spelling Dictionary File, when you add a custom word to Spell it is stored in this file and included in the dictionary when doing a Spell Check.
C:\System\Data\Calendar, C:\System\Data\Almsvr.dat Calendar Dates and Alarm dat file
C:\System\Data\display.mbm The file that stores the textures used in the Command Button Area. This can be customized
Bookmarks