okay amazing, i will give it a try.
thanks for letting me know about the benefit of the fw img /cfw booter, had no clue about it.
i thought for DLC redNAND was a must.
one last thing i would like to ask is, will the dlc on the magical is* site that say e.g MK8 DLC for USB (redNAND) work with this method of cfw booting ?
I would not touch this coldboothax unless you know exactly what you are doing!!! and by the sounds of your comments you don't. You will probably come unstuck with a brick and then you will be coming back asking what to do to recover, which you cannot this is why there is a sticky thread saying leave well alone. Do not do it, trust me!
If you are really going to do it and not listen to me make sure:-
1. You have your contenthax installed on systemnand not usb and have standby/quickstart disabled in settings.
2. Double make sure you have your last line in config list as default fw.img> default=fw.img
3. Use Dimoks latest build as cfw.img and compile it yourself.
https://github.com/dimok789/iosuhax
4. If your using say PAL Brain Training in your system.xml you would put this line in below and save it. Make sure you make a double copy of your original system.xml and call it syshax.xml to upload that as well with wupserver>
<default_title_id type="hexBinary" length="8">00050000
10179C00</default_title_id>
This is the line you need in wupserver to upload your new file>
w.up("system.xml", "/vol/system/config/system.xml")
and change "system.xml" with "syshax.xml" to upload that file.
w.up("syshax.xml", "/vol/system/config/syshax.xml")
Last give the config syshax.xml file admin right permissions in wupserver, if needed>
w.chmod("/vol/system/config/syshax.xml",0x644)
Turn your WiiU off and back on again.
5.. Just make sure you follow step by step.