First lets talk about the images.
1: They are based on Debian repos built by a collection of custom scripts.
2: Whilst some images have been written to SD card via RPi Imager Balena Etcher is recommended.
2a: If you use Linux there are plenty of other tools, Ubuntu\Mint has USB Image writer.
3: If you use the RPi Imager any adding of user or wifi info does not work. As the image is a custom one, only the kernel is built from RPi Sources.
4: If you are using an Rpi5 & a 7c80 0r 7c81 the driver to be loaded is hm2_spix
5: If you are using an RPi4 & a 7c80 or 7c81 the driver to be loaded is hm2_rpsipi
6: The images now have the SPI interface enabled by default.
7: Location of config.txt /boot/broadcom/config.txt once again this is a custom build.
8: raspi-config is not in the image, the tool to use is menuconfig.
9: The default username is cnc.
10: The default password is cnc.
11: The images are not meant to be a fully fledged daily driver Operating System, the are just enough to run Linuxcnc.
Links to images:
www.linuxcnc.org/iso/rpi-5-debian-bookwo...25-01-27-0140.img.xz
www.linuxcnc.org/iso/rpi-5-debian-bookwo...7-0140.img.xz.sha256
www.linuxcnc.org/iso/rpi-4-debian-bookwo...23-11-17-1731.img.xz
www.linuxcnc.org/iso/rpi-4-debian-bookwo...7-0404.img.xz.sha256
