@tadziuuu Just to be clear on a few points.

The .iso / memdisk route only works for bios based computers. This will not work for uefi based computers.

With the .iso image files and the parameter block I previously provided, you get the error message about initramfs? If yes, then I suspect the fetch command is not downloading the squashfs filesystem. I copied that command over from your initial parameter block. It looks like we need to focus on that bit then.

@tadziuuu Are you referring to booting bios based computers? If yes then use memdisk to load the cd iso image into memory. The one caveat here is that the iso disk must be less than 2GB in size since memdisk is a 32 bit application and there needs to be room in ram for the OS to boot from the iso image. In the same tutorial you found the parameters in your first post, search for memdisk to see what parameters you need.