Confirming- Kmeaux's CFW + L2 Patch + MultiMan= working backup (NFSHP)
Went from OFW 3.55 to Kmeaux's CFW in recovery mode. Ran Kmeaux's L2 patch in xmb and installed Multiman and ran it.
It read my external backup of NFS HP with no problems. Ask to load disc from Multiman, just cancel and it will take you back to XMB. Check APP/Home folder in Kmeaux's XMB and you will see the game you are trying to load. Runs perfectly!
FYI: I am on FAT Model-40gig , CHECH... no worries mates!
P.S- haven't played online yet but it appears to be all well for now. no freezes or anything but I will report anything unusual.