"e" has released his e[mulator] version 0.80 Beta 5. e[mulator] for PSP is an emulator which combines e¡¯s own eSwan with HuE together. eSwan is an emulator for WonderSwan on the PSP, and HuE is an emulator for PC-Engine on the PSP. Here is the message from the author for this release:

The speed problem still persists, but the emulation degree should've been improved.
This is a release for you to send feedbacks in.
The SRAM saving function is slated for the final version, but is yet not implemented now.

Please report any problem you encounter. I'm now off to write the SRAM saving funtion.