[LG Optimus L3 II, L5 II, L7 II, L9 II] slipsystem:
What You Need

a stock based rom to work with

I am not going to go into detail of how to make on because there are numerous tutorials on how to do this. if you would like a tutorial on how to do this here is a link http://xdaforums.com/showthread.php?t=2195858

This is a stock based rom for the e450. i have already deodexed and zipaling all the apps.

the keyboard does not work because it was deodexed.

https://mega.co.nz/#!a1gTTL4B!JJ6Lin9K5gbTW5O4OfTZTkDnxWXEXjfaE9szbpa0W6E

Java

you can probably get away with installing JRE but this is the start of something bigger so download the full JDK package.

http://www.oracle.com/technetwork/articles/javase/index-jsp-138363.html

Android Kitchen and Cygwin

Android kitchen is a very nice program for building your own rom. this will allow you to deodex, zipalingn edit bootimg and much more.

Cygwin allows you to run linux programs in windows. (ie you need Cygwin to run Android Kitchen)

Android Kitchen

Cygwin

if you want to know how to set it up head over to http://xdaforums.com/showthread.php?t=2195858 there is a nice tutorial on how to do it.

Apktool

apktool allows you to decompile, edit and recompile apps. this is perfect for editing apps.

https://code.google.com/p/android-apktool/

Android Multi Tool

you can probably just use apktool but lg apps have to have original metainf and I am not sure how to do that in apktool so I use both.

http://xdaforums.com/showthread.php?t=2326604

Winrar and 7zip

I use winrar to edit flashable zips because its easier. I use 7zip decompress zips because i found errors on winrar. so install them both.

http://www.rarlab.com/download.htm

http://www.7-zip.org/download.html

Notepad ++

I find notepad ++ stable for editing xml files.

http://notepad-plus-plus.org/

Slimming Down

now that you have a stock based rom, one of the most important things about making a good custom rom is making it fast and bloat free. the easiest way to do this is to remove as much junk as possible.

to do this simply open the stock rom in winrar and start removing.

here is a list of things you can remove from your stock based LG 2nd Gen Rom.

/system

usbautorun.iso this is that annoying disk image that wants you to install LG software every time you plug in your device

/system/app

# Remember if you rom is odexed you need to delete the corresponding .odex file

AtciService.apk not a big app but it is constantly running in the background
AAT.apk not sure what this does I removed it from day 1
AlarmClockbin.apk this is the alarm clock app you may want to replace it
ApplicationManagerbin.apk this is the app manager that allows you to freeze stock LG Apps
Calculatorbin.apk this is the calculator app you may want to replace it
CBbin.apk I cant remember what this does but if i recall it is the Remote Call app
ChromeWithBrowser.apk this is the chrome app if you remove this also remove the app bellow
ChromeBookmarksSyncAdapter.apk chrome sync
DoubleTapWakeup.apk this is the knock on feature, I replaced the home screen app so I deleted this aswell
DrmProvider.apk not sure but it runs in the background
DrmService.apk not sure but it runs in the background
EngineerMode.apk this is the hidden menu when you dial a certain number
EngineerModeSim.apk this is the hidden menu when you dial a certain number
FontServer.apk this is found in settings>display>font style. all the fonts look the same to me so there is no need for me to change them.
Gallerybin.apk this is the picture app you may want to replace it
GMS_Maps.apk this is google maps
GoogleDrive.apk google drive
Hangouts.apk Hangouts
HiddenMenu.apk this is the hidden menu when you dial a certain number
HiddenSIMUnlockMenu.apk this is the hidden menu when you dial a certain number
LGBrowser_JB.apk this is the browser you may want to replace it
LGEIMEbin.apk the keyboard app that doesnt work you may have to replace it
LGHome3_Theme_Biz.apk LG Home Theme
LGHome3_Theme_Cozywall.apk LG Home Theme
LGHome3_Theme_Marshmallow.apk LG Home Theme
LGHome3_Theme_Optimus.apk Default LG Home Theme only delete this if you replace the Home Screen app
LGHome3a.apk LG Home you may want to replace this
LiveWallpapersPickerbin.apk Live Wallpaper Picker
Memobin.apk memo app
Music2.apk Google Music
Musicbin.apk LG Music App you may want to replace it
PCSyncUI.apk PC Sync
PlayGames.apk Google Play Games
PlusOne.apk Google Plus
QMemobin.apk Qmemo app
RemoteCallbin.apk this allows an LG Technicial to log into your phone is you phone them.
SetupWizard.apk Setup Wizard Not to be confused with LGSetupWizard_JB.apk deleting that will create a continual boot.
StreamingPlayerbin.apk LG Streaming Player
Street.apk Google Street View
Tasksbin.apk LG Task App
Videosbin.apk Video App you may want to replace this
WeatherMultiCPbin.apk Weather App if you delete this also delete app below
WeatherThemebin.apk theme for weather app
YouTube.apk Youtube App

/system/apps/bootup

FileManagerbin.apk File Manager
LGSmartWorldbin.apk Smart World
PolarisViewerbin.apk Polaris Viewer
SafetyCarebin.apk Safety Care

/system/lib

libchromeview.so lib for google chrome if you removed chrome remove this also

/system/media

Videos they are test videos and not necessary
shutdownanimation.zip this is the shutdown animation

/system/media/audio/alarms

all alarm tones except Lifes_Good_Alarm.ogg as that is the default

/system/media/audio/notifications

all notification tones except Optimus.ogg as that is the default

/system/media/audio/ringtones

all ring tones except Lifes_Good.ogg as that is the default

/system/tts/lang_pico

all languages except your language

/system/vendor/carrier/system

LGOnline-signed-no-login.apk I have no idea what this app does

[YOUTUBE]K5vuSpaHGQY[/YOUTUBE]