Doesn t work for me.
so, to get mp working, get patched t5mp_ps3f.self from debug update
copy it to game's folder(the one inside GAMEZ folder) into usrdir folder, replacing old file
copy(replace) posted eboot.bin as t5_ps3f.self to the same usrdir folder (to be able to get back to sp from mp)
then, remove t5mp_ps3f.self and t5_ps3f.self files in update folder (/dev_hdd0/game/"cod bo"/USRDIR/)
now u can play both sp and mp fine, mp works via xkai link.
p.s. dont ask me where to get t5mp_ps3f.self