i think i found something but still need to test, found on a spanish forum lol

Wiiengine 1.0 (c) 2008, Francisco Muñoz 'Hermes'

ATENTION: This software writes on your SD, creates directories, renames and erases files using libfat, so it is recommended to do a backup of the SD to avoid data loss.


Directory tree

root
|---apps
|---roms
|--pcengine
|--saves -> save states, WRAM saves
|--img -> .bmp, frames captured
|--syscard.pce -> system card by default (you must include it for CDROM support)
|--Rtype.pce.bz2 -> a game rom in one .bzip file
|--bomberman.zip -> other game rom in one .zip file
|--dracX.iso -> a CDROM game (without audio tracks)
|--favorites -> folder with your favorites roms
| |
| |--- afterburnII.zip
| |......
|--draculaX -> folder with a CDROM game
|
|---- draculaX.toc -> CDROM descriptor file (load this)
|----- track1.ogg -> audio track
|----- track2.iso -> data track
|----- track3.ogg
| ......

Note: the system card, can be compressed in .zip format (syscard.zip) or .bz2 format (syscard.pce.bz2)


Characteristics:

- Based on gp2xengine, the PCengine emulator I made for gp2x and that includes parts of Hugo and XPCE among others.

- 512 entries per directory. The main directory must be :/roms/pcengine and an additional level with different games can be added. (i. e. :/roms/pcengine/DraculaX with the data/audio tracks needed for the game or :/roms/pcengine/favorites with your favorite games)

- Support of PCengine roms in .pce .bz2 or .zip. formats. A .bz2 compressor is included in the program to convert the .pce files to .bz2 from the file viewer.

- Support of CDROM in .iso and .toc. formats. The .toc format is a description file wich links the different audio and data tracks, and also can link a specific system ROM for the game. The audio tracks can be in .wav or .ogg format, 22.5/44.1Khz stereo/mono 8/16 bits. A system card is needed for CDROM support.

- The utility bincuesplit (created by myself) is included to extract the data and audio tracks from a cue/bin CDROM image. The program provides the .toc file and the audio tracks compressed in .ogg format.