os9.1/9.2 Folder System – Explained
credits : DJNJ, smarty & others

WARNING :
This guide here is only for hacked phone.
Please use this guide only for learning.
We do not take any responsibility for damage caused if you modify these files/folders. Please make sure u know exactly what u are doing

Inside C:Private folder there are some sub folders :

1000295
DBS_100065FF_Contacts.cdb – Contacts Database
DBS_100069CC_btregistry – Bluetooth device List
DBS_10207216_SWinsLog.db – Instalation log of Softwares

1000395bCalendar – Calendar File
10003A73Cntmodel.ini – Speed dial Numbers
1000484bMail – Mail Folder (SMS)
101F413CSIPprofiles.dat – SIP (Session Initiation Protocol) Profiles
101F4668UnitConverter.ini – Stored Exchange Rates in the Converter
101F8530Cookies – Browser Cookies
101875aStartup – Startup Files ?
102072CCSIMLanguage.dat – Current selected language of the SIM
20003252Menuketserver.ini – (This File is in the Startup List)
10003A3Fimportapps – All your shortcuts to installed applications are saved in here in .RSC format, simply rename the .RSC to .RSCX to temporarily remove them from Menu, you can rename .RSCX back to .RSC later on.
101f401dLogdbu.dat is the log file.
101F4CD2Applications.dat is the file that holds the settings and locations of icons and custom folders located on your phone’s MENU.

C:resourceapps – The MIF files (Icon Files) Of the Softwares Installed in the phone,

C:sysdatammcstore – This file has the Memory Card Password, Open with a text editor to view the current memory card password.

Some interesting facts. not yet tested on all phone but please test yours and let me know the result here.

1. C:private10000850
contains the mbm file of operator logos

2. C:private100059c9start.dat
some kind of autorun trigger. I couldnt decode this file, but it is it, I’m sure.. Why I think so? Because only after renaming or moving this file, autorun doesnt work. In all other cases apps start.

3. C:private10202be920001079.txt
this location.. in this text file there is code, and a line which says :
Code:
0×00040006 string “clockspeed” 0
0×00040007 int 332 0
on line 41 and 42 of the file.. overclocking possibility maybe?

also in this file is loads of settings with the graphics processor too, maybe even OC this check it out, im not the experianced when it comes to this, and i do have a spare n95 which i wouldnt care if it blows up, i willing to test it
Code:
0×00A00000 string “/hardware/graphics/displays/0/ngageorientations” 0
0×00A00001 int 0×00090000 0
0×00A00002 string “ngageorientationscount” 0
0×00A00003 int 3 0
0×00A00004 string “defaultngageorientation” 0
0×00A00005 int 0×08 0
0×00A00006 string “useroptions” 0
0×00A00007 int 0×0B 0
0×00A00008 string “wsinimodes” 0
0×00A00009 string “0×01, 0×02, 0×08″ 0
ngage stuff there

Code:
0×00090000 string “/hardware/graphics/displays/0″ 0
0×00090001 int 0×00080000 0
0×00090002 string “nativewidth” 0
0×00090003 int 240 0
0×00090004 string “nativeheight” 0
0×00090005 int 320 0
0×00090006 string “pixelsperinchx” 0
0×00090007 int 154 0
0×00090008 string “pixelsperinchy” 0
0×00090009 int 154 0
0×0009000A string “nativecolorformats” 0
0×0009000B int 0×00050000 0
0×0009000C string “brightnessadjustable” 0
0×0009000D int 0 0
0×0009000E string “contrastadjustable” 0
0×0009000F int 0 0
0×00090010 string “gammaadjustable” 0
0×00090011 int 0 0
graphics settings there..

4. In Z/private/101f51f2/PKI/96b7db19a4d…../
it has files in called
Code:
devicecert.der
deviceprivatekey.der
signningcert00.der
signningcert01.der
or in Z/private/10203636/security/trustroots/device/certificates/
nokia content signing
Code:
nokiaonlineca.cer
PCA3ss_v4.der
thawtepremium.cer
UTI_Root.der
click on any of them it says save certificate.
then when you click save it says new cert might be unsecure save anyway? i ant got round to clicking save yet

5. C:PRIVATE101F4CD2Contentappshelldata.xml
this file contains the whole menu layout (N82)

6. I found some huge file in phone, c:/private/102072c4/reserved.bin, 4.5 Mb size of plain 0xff.
Deleted it and free up phone memory check if your phone has one.
the files are for FOTA (firmware over the air) coz when i remove it, and go to the device mgr. app it reapears, so its safe to remove it, we wont need it as we never get any FOTA updates.

Excellent info. BTW, I want to add a bit of info to it.
C:Private10005A3Emediaplayer.dat – This is list of Recent clips in Real Player. Those who want to hide what videos they have seen, can just delete it
And for OS9.1 phones (in my N73-1), some of the folders are different. For example, the
C:Private100012a5DBS_100065FF_Contacts.cdb – Contacts Database
C:Private100012a5DBS_100069CC_btregistry – Bluetooth device List
C:Private100012a5DBS_10207216_SWinsLog.db – Instalation log of Softwares
C:Private10003a5bCalendar – Calendar File
Hope this helps someone.