Ok im not sure if anyone will be interested, but here we go.
I have been attempting to mod the MW2 patch for the PS3, so far i have made a ps3 patch.ff and have got my MW2 patch . pkg .
i now have to open up the patch in linux and add my .ff to the pkg, making sure the checsum still goes to F9.
After i have done the checksum, (a looooong time away, ) i will trick the ps3 into downloading my patch from a proxy via the PSN pc hack.
if all goes well i may be able to host lobbies 
Ill post my progress.
BTW my patch is in GERMAN so it is hard to understand