Chaos Zero Installer

Hi, I am running a devhook by chaos zero called "Devhook 0.45 Ultimate Insataller v1.1". My psp which is a standard 1.5 firmware. I am trying to run Tomb Raider Annivesary, but the devhook only emulates firmware upto 2.71 and i need to emulate a least 3.5. Does anyone know of a similar program or and updates for this devhook. Thanks Darren :)

I have the same problem as you my friend, even if i try playing it via other methods (i dont think i need to mention which one)

But I've decided after long last to upgrade to a custom firmware, im just reading up on which now, as ive been out of the scene for a few months and a lots happened that i need to catch up on.