http://www.4shared.com/file/Qbocuo2G/_3__All_in_One_Plus_v250_5800v.html
this is for v50..there is one for v40...just google it
you will need your certificate to sign or have hacked phone

it is a bunch of little hacks and stuff all in one install
before this you needed a hacked phone to reconfigure all these little things to help the phone runn better

allinoneplusv50....
Faster reading images from the gallery (excluding folders from reading)
Improved kinetic scrolling (fixed)
Improved quality camera by Zacie (Thanks) - (no N97)
Faster rotation in landscape and portait
Integrated SystemCache
Change Destination Cache Internet (E
Increased cache memory Internet
Optimizing Battery - Touch Vibration reduced for lower power consumption
Opening and closing applications faster
Integrated CamSaveRam
Goodbye Nokia Hands (eliminated the Startup)
Faster music player (it should read only in E: \ Music)
Camera Sound Off (in silent will not hear the sound of the camera)
IU Graphics Accelerator