RPCS3 for Newcomers

Hi, I'm trying to run Metal Gear Solid 4.

I'm booting the game from the SELF file. I'm using the interpreter, because using the recompiler results in RPCS3 crashing.
The game seems to "start" (it shows me a black screen and is apparently running the main thread). However I'm getting the following error message:

Code:

{PPU[0x70000001] Thread (MGS4 MAIN) [0x0030e4dc]} 'cellFsStat' failed with 0x8001003a : CELL_ENOTMOUNTED

And

Code:

{PPU[0x70000001] Thread (MGS4 MAIN) [0x0030e4dc]} sys_fs: sys_fs_stat(“/dev_bdvd/PS3_GAME/USRDIR/mgs/”) failed: not mounted

Here are my settings:

Code:

Audio:
  Convert to 16 bit: false
  Dump to file: false
  Renderer: XAudio2
Core:
  Hook static functions: false
  Load liblv2.sprx only: false
  Load libraries:
    - libspurs_jq.prx
    - libsre.prx
  PPU Decoder: Interpreter (fast)
  SPU Decoder: Interpreter (fast)

And here's the full interpreter log:

https://gist.github.com/fdemian/1b5a27cd...df8159affc

I get the feeling that I'm missing something very basic . I'd appreciate any hints.

EDIT: also it seems there is an unimplemented texture. Since I'm not sure the game is actually doing something useful at this point, I'm not sure wether to report it or not.

Code:

{rsx::thread} class std::runtime_error thrown: Unknown surface color format 0x0