Hi
Heres what i read somewhere.. maybe it will help
you need to make a folder "Seplugins" in MSRoot
Place the plugin on the folder created
Create three text files:
seplugins / vsh.txt plugins for the XMB
seplugins / game.txt for plugins for PSP games and homebrews
seplugins / pops.txt for plugins for psx games
add a line that points to the plugins you have placed in folder, in the corresponding text file:
"Ms0: / seplugin /-name plugin.prx 1"
Numeric one is to activate the plugin.. you can out numeric 0 if you want to keep the plugin deactivated
Restart the PSP
Then restart ChickHEN and Custom Firmware Enabler