sorry, but no. HAHA, why would he do that. what version were u on befor, you sould've disabled network update, then you would be safe. IM sorry, you can't use the 3.50 downgrader, sony patched it in 3.51/3.52. Your best choice= modchip/new psp/new mobo.
no, think of it this way, with every downgrader there's a exploit, and sony patches it with every new firmware, now that theres been alot of downgraders, the chances of one of those exploits being here, will shrink, so i doubt it will be out for a while now, if ever. 501st POST!!!
whats a buffer overflow? btw i was playing socom ftb2 onmline one time, and randomly this happened twice: it just went into another screen and became blue, so i rebooted and then i tried again, i played for a while, it happened again and this time the screen was orange! is this an exploit?