Q: "fatal errore check permission of file /home/opt/psx4m/keys"
A: install rootsh package and open x-terminal
in x-term write follows

$ root
$ mkdir -p /home/opt/psx4m/
$ chmod 777 /home/opt/psx4m/
$ rm /home/opt/psx4m/keys
$ chown user /home/opt/psx4m/

and restart psx4m-gui


Q: "error! no bios found"
A: psx4m uses psx original bios, we do not provide it so you have two ways

* dump it from psx by yourself (google for instruction)
* download dumped ( it's illegal so no links,googling will help you)

after copy bios in MyDocs folder wtih name scph1001.bin (/home/user/MyDocs/scph1001.bin)




Dont use it in fullscreen mode and install the bios

can help a overclock of n9009 at 850Mhz ^^