Ok, you really came to the right place mate.
I could remove the HUD, that's no problem for me.
The problem is to remove the weapons.
Why?
Because warrock uses a CRC Checksum.
It checks the CRC-32 Hash Value of the texture/weapon files.
Now, I already managed to edit this, so the edited file has the same Hash Value as the original one.
I only need to solve the file size problem.
So if anyone knows a way to edit file size, please let me know