[HOWTO] Cook your custom rom for LG P500

1. Original ROM (Check this thread)
2. LG Utils 0.4.2 (Check this URL)
3. DzDecryptor v1.0b(Check this thread)
4. Cygwin (Check this URL
5. Unyaffsmbn (Check this thread)
6. Dsixda's HTC Android Kitchen (Check this thread)

1. First we need to get a dz from the kdz (original firmware), extract LG Utils 0.4.2 and open KP500-Utils-EN.exe (You need to run this as administrator, or else you are getting an empty .cab file), select the I option (Extract files from KDZ file), and type the route to your .kdz file (Mine is C:\Users\Patricio\romcooking\V10A_00.kdz). Now, you must have a V10A_00.cab (Or another name, it depends on the stock rom you downloaded), open it with a extractor like 7zip or similar and extract the file "LGP500AT-00-V10a-EUR-XX-SEP-25-2010+0.dz" or similar to our romcooking folder.
2. Then we are going to uncompress the .dz with DZDecrypt (Press Win + R, type cmd and enter, then you cd to the folder where DzDecrypt is located (ex:
   
   Code:

   cd C:\Users\Patricio\romcooking\DZDecryptor_v1.0b

   then we type:
   
   Code:

   DZDecrypt.exe "C:\Users\Patricio\romcooking\LGP500AT-00-V10a-EUR-XX-SEP-25-2010+0.dz" C:\Users\Patricio\romcooking\stockrom

   This is going to create a "stockrom" folder in our original romcooking folder, you are going to see a lot of files in the stockrom folder, the important ones are boot.img and system.mbn (DZDecrypt should have merged your system.mbn_0, system.mbn_1 and system.mbn_2)
3. We need to install cygwin, open the setup.exe, just keep hitting next until you are on the select packages screen, go to "Devel" menu and select to install gcc, gdb and make, in "Interpreters" check perl, in "Archive" check zip and unzip, in "Web" check wget, in "Editors" check nano and vim and in "Utils" select cpio, util-linux and ncurses. Make some tea and wait for the cygwin install to finish and we are ready to go to the next step.
4. We are going to compile unyaffsmbn, copy the extracted files from unyaffsmbn, system.mbn and boot.img to C:\cygwin\home\Patricio, now fire up cygwin and compile unyaffsmbn with:
   
   Code:

   gcc -o unyaffsmbn unyaffsmbn.c

   Now uncompress system.mbn, delete symlinks of bin/ and zip everything with:
   
   Code:

   mkdir system
   cd system
   ../unyaffsmbn.exe ../system.mbn
   find bin -type l -exec rm {} +
   cd ..
   zip -r stockrom.zip boot.img system/

   We are ready to go to the kitchen (We have a stockrom.zip on C:\cygwin\home\Patricio, remember that)
5. Now we are going to use dsixda's HTC Android Kitchen, we need to have installed JDK. After we have downloaded and uncompressed the kitchen (Mine is in C:\cygwin\home\Patricio\kitchen), we need to put the ziped file we got in the previous step into the original_update folder of the kitchen. We are ready to go! fire up cygwin and cd to the kitchen location and exec ./menu , select option 1, you should see the zip file, put the number of it, and you are ready to go (It will create a WORKING_XXXXXX_XXXXXX folder, you can modify the files in WORKING_XXXX_XXXXX/system, add APKs, modify the apns file, etc).
   This command also gives us a lot of options for our rom: enable root, add busybox, deodex our files, zipalign, etc. If you are going to edit text files, use an editor like Notepad++ or any other program that can open/edit/save files in linux compliant style. It's pretty easy to use the kitchen, just check the official thread for options or help

1. Add root permission (option 2), press f when asked and you are done
2. Add Busybox
3. Change name of the rom, easy cake
4. Advanced options, press 0
5. Add /data/app functionality
6. Add Apps2SD
7. Add custom boot animation functionality
8. Deodex files in your ROM
9. And Finally: Zipalign all *.apk files to optimize RAM usage

vinnux said:

hi there... thanks a lot for your guide.
I'm trying to do the things you wrote step by step... I have extracted the dz file successfully, then I extracted the content using DZDecrypter... I found three files called system.mbn0, system.mbn1 and system.mbn2. The first and second are 80 Mbytes, the third just 17... Which one is the correct? When I try to use the command "unyaffsmbn system.mbn" (obviously I renamed the first and then the second) I get an error message ("impossible to execute binary file", or somenthing like that... I don't know how's in english because I'm italian).. Is that concerning to the presence of those three different files? Did somethind go wrong with the extracting process? Or maybe I didn't do somenthing important? Before doing this, I installed "build-essential" and did "gcc -o unyaffsmbn unyaffs.h" but apparently nothing happend... I got neither errors nor processes...
can you help me?

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ioshi said:

exist only a windows version of dzextract?

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