Bluetooth success story

we used swicwe to stitch together the new yocto cwe with the bootloader, modem firmware and legato images into a single spk file and flashed it using swiflash
yes! I thought it should be like this. but where did you got instructions ?
can you please share it? step by step description. was it VM or hardware Linux?
Does it means that steps described here https://github.com/mangOH/mangOH/wiki/Bluetooth-WL18xx-driver-for-mangOH are wrong?