Detail guides to modify the internal clock?

Hi, i am new to this forum and just downloaded rpcs3 few days ago. I got some questions to ask.

1) Can anyone provide detail guides on how to modify the internal clock in rpcs3 ?
2) Is it possible to boot into ps3 firmware ?

Thanks.

1) Change OS clock (before opening the emulator)

2) Not on master builds, going to take a while