Oddly enough, they are still there after enabling 'hide corrupt icons'.
Use PSP Filer 6.6, and change the date of the folder so it moves to the bottom of the list. (all the corrupt icons should be at the bottom of your game list, at least they are out of the way, I mean the DLC game folders in the list display.
How do you update using Easy Installer?
like ePSP, it's susposed to install a fake psp game you then enter the path in the "tai:/config.txt" folder and then when you click on the fake psp bubble the game should start. Well, ePSP didn't work, plus I already purchased POOL HALL PRO from psn a while back for 3.55, so I didn't need to try anything else.
(Wrote a full tutorial here and there in the Adrenaline 3.1 thread, a while back I think, instead of purchasing a game, just use the program you refer too, "easy installer", then go from there)
(Don't want to mess up my existing setup, I have another psp with current firmware on it, if I can downgrade that, then I'll retry those programs again, maybe buy a damaged pstv from ebay for cheap on older firmware and play with it eventually, I restored two broken psp slims from ebay and they work fine for nostalgia, broken lcd replaced, broken power switch replaced)
Great Job on Adrenaline 5, I deleted some psp games so I could make more room for Colony Wars Trilogy on PS1, plus, I don't know may alone in the dark too, I never played that through.