OFW 3.93 is **not directly exploitable** on most models. You must **downgrade to 6.60 or 6.61 OFW first** (via Pandora Battery + Magic Memory Stick on 1000/early 2000; or signed exploit on later models).
Then install **6.61 PRO-C2 / ME-2.3 / Infinity 2.3** (permanent CFW on 1000/2000; temporary on 3000/Go/Street).
Strongly consider: Just run **PPSSPP** (excellent PSP emulator) on your PC/phone/Steam Deck. Plays 99% of library at 4K, save states, texture upscaling, no hardware risk.