Alright for the people that keep getting a black screen. Heres what I did fix the problem
First of all large folders will be needed to be split up, Soo depending on if you ripped the game from a disk or downloaded it, If you ripped it from a disk (Assuming this is multiman) it would have split big folders in to little psarc files,
eg. data_ps3.ps3.psarc.66600
data_ps3.ps3.psarc.66601
these will be found under..GAMEZ\BCES01007-[Killzone3]\PS3_GAME\USRDIR
If you have downloaded the game, You will need to get OpenSplit V1.2 (google it) then Click "Split big files to .666xx" then navigate to your killzone file and let it run.
After this you will have a list of psarc files in the USRDIR, Alright now copy those files to your computer.
Next you will need to open up OpenSplit V1.2 again and then click on "Merge .666xx to big", then select the folder you placed those folders. The program will now merge all those folders into one big psarc file.
From here you need to download PSARC (google it, was the first link on the list for me) then drag that big psarc file into the folder you have placed PSARC.exe, then literally drag the large psarc file ONTO the PSARC.exe
Ok.. now PSARC will start rambling on about all the shit it is extracting so just let it run its course (may take a while), it will turn that file into a few folders that you will then place back into your portable hdd in the same spot u grabbed them so for me it is GAMEZ\BCES01007-[Killzone3]\PS3_GAME\USRDIR
(if you ripped the game from a disc you can now delete the split up psarc files in that folder.)
then run lv2.pkg, run multiman, enjoy
note* If you have trouble with any of this or i didnt quite explain something right just quote me here or send me a msg