Lcustom firmware 6.39ME-2 installer BETA for OFW6.39 by neur0n-- What is this? --
This is Lcustom firmware installer for OFW6.39.
Only work on 01g ,02g , 03g, 04g, 07g and 09g model.05g (GO)is not supported.
The degree of stability is still unknown.
Please test it on your own and refer to different people's test reports.-- How to use --
Copy "installer" folder and "launcher" folder at "ms0:/PSP/GAME/"-- Preparation --
First. You need to install Lcustom firmware modules in your PSP.
1.Execute "639 installer" from XMB.
2.You can select these action:
Press x to install Lcustom firmware.
Press  to uninstall Lcustom firmware.
Press R to exit.
After the action, PSP will rboot.-- Start Lcustom firmware --
1.Execute "639 launcher" from XMB.
2. enjoy -- credit --
some1: For his sceHttpStorageOpen kxploit.
liquidzigong: For his 639kxploit POC.
bbtgp: For his PrxEncrypter.
J416: For his rebootex sample.
Source: neur0n's Twitter