Change Stock launcher app drawer grid with root

hi,

today i found a new way to change app drawer grid as after "1.5 g3 tweakbox upgarde" i was not able to change the grid

so i just did the following:
1. navigate to >> data/data/com.lge.launcher2>shared_pref
2. edit numofmenu.xml
3. change values of Xnumofmenu for Row and ynumofmenu for Columns
4. save
5. restart the launcher from settings>apps

now the grid has been changed

prob:
but after every phone reboot grid comes back to 5X5 and have to repeat the process again

any help for solution is welcome

thanks