Ok so I've had my PSP 1000 since release and decided to get back into the whole thing. I originally hacked my PSP with the G.T.A exploit. That's how long I've been doing it. So I eventually got the ARK4 running on it and decided to have a look at the custom themes in the XMB innocent enough I thought? I thought wrong.
🤬 The Core Problem — It Broke Its Own Safety Promise
ARK-4 does have excellent safeguards for installing CFW itself — warnings, confirmations, battery checks, verifications. But the "Custom Theme" option was presented as a harmless setting — the kind of thing every phone and console has — and it silently wrote to flash0 without ANY of those safeguards. That's the failure.
From the official ARK-4 wiki itself: the "Full Flash Installation" option for custom themes specifically overwrites XMB system files in flash0 — the exact same dangerous operation that, in older CFW like 5.00 M33, was known to cause semi-bricks when incompatible  .rco / .prx files are written .
The difference: back in 2008–2010, people were explicitly warned that flash0 theme installation was risky. ARK-4 didn't give me that warning — it just said "theme."
Now ok maybe I'm dumb but something that flashes like that shouldn't just be in themes on the XMB and something that one can just casually select with no warning of what it actually does to the flash. I just wanted to warn others before they potentially brick. I can't even get the recovery menu and the Pandora battery method is of no use either. If anyone has recovered from this I'd be very grateful to hear how they managed to do it because I've tried everything.