DsonPSP Beta 4 is released.DsonPSP is a Nintendo DS Emulator for the PSP.The DSONPSP emulator is based on DeSmuME v9 core, and has a file browser, frame skip, vertical and horizontal display options and a few other settings.

DsonPSP Beta 4 Changelog
- Speedup.
- More Fixe game freeze.
- Source Code For PSP not cleanned.

Download: DsonPSP Beta 4
Source:Here