How to JB your PS3 on 3.55 update and Host Challenge Lobbies

 Step 1: Delete the Mw2 patch
Step 2: Re install the mw2 patch
Step 3: Open File Manager .
Step 4: On the left side of screen go to Dev_hdd0
Step 5: Then game
Step 6: Then your mw2 region ex . Blus30377
Step 7: Then USDIR
Step 8: Then Highlight over patch_mp.ff
Step9: Now go to the right side of the screen and go to the dev_usb
Step 10: Now click on the patch_mp.ff on your usb hit select, circle, start, then wait 2 secs then press select.
Step 11: Test Patch in private match or splitscreen!
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