Easy method to get most if not ALL games working perfectly on kmeaw's CFW.
Make sure you have Multiman, Rogero and Gaia manager's installed.
I found that if games don't load properly on Multiman the first time, switch to rogero and launch them, trigger the eboot permissions fix, once it's done most games will work on Multiman and gaia already.
Make sure you have original eboots on hand, and if you are having trouble installing updates, you can download them by using a homebrew software called "Another New Update Software" which will allow you to search for and download retail updates.
Just my info for the newbs.
Already have most of my backups working, GT5, RDR, BLOPS.... just to name a few, games that were ridiculously hard to launch previously now able to launch and patch without a hitch and even played online!