Hacking How to set up DSTWO+ cpu speed ?

[Indy13]

Hi,

I'm looking for an homebrew or a way to overclock my DSTWO+ CPU, the same option as BAGplug but for the official firmware.
I'd like to try to load ScummVM J build and other stuff (like Quake or Doom) at 396MHz, is there a way to do that ?
I mean is it possible to customize the globalsetting.ini file to add a cpu's speed selector ?

Thx in advance.