The guys from Hitmen have released a brandnew”PSP Hacking and Information Tool”. It can:

Memory view of entire memory (Hex B/W/L, ASCII, Hex/ASCII)

Disassembly of entire memory

View coprocessor registers, even within disassembly

Load/Start/Kill/Dump/… Threads&Modules

Suspend/Resume threads to have full control over your PSP

put PSPInside to background while running other apps (note button)

… and countless other Stuff to explore on yourself 🙂

http://www.hitmen-console.org/