This is Custom Firmware (CFW) 6.39ME-9 for PSP 1000 and 2000 models. After Downloading the files with the links below, these are the steps
Step 1: Open or Extract the LCFW files out of the first package, place both folders for the installer and the launcher in the ms0:/PSP/GAME folder.
Step 2: go to the rot of the PSP memory stick (MS) and either open or create the seplugins folder. in the LCFW files open the leda folder and place the leda.prx file in the seplugins folder. now either create the game.txt or open the game.txt and instide write "ms0:/seplugins/leda.prx 1" (no quotes) and exit and save.
Step 3: no go back to the PSP GAME folder and open up the CFW download files and you wil see an UPDATE folder. Place the UPDATE folder in the ms0:/PSP/GAME folder and then go to step 4
Step 4: run the installer for the LME and let it do its thing, after it brings you back to the XMB run the Launcher for the LME and then after that takes you back to the XMB run the UPDATE and your done. Make sure you do it in that order too.