E3 flasher/ dual boot

hey everyone hope all is well. since my last post i didnt do much since i had gone back to OFW cause some of this stuff is confusing. xbox 360 wasnt this in depth but its cool cause i enjoy learning new things.

so all i have to say about that Effin nor clip is ill never EVER use one again and i have wired up the 100 solder points to read/write the nor and it works flawless.

but in order for me to be able to R/W and boot from the E3 Nor i have to CUT! a trace? and i am able to boot from the E3 OB nor chip right? or is this just a storage for a nor image?

also please someone correct me if i am wrong but from what i understand is.....

i make a Backup of my ps3 nor chip and save it to my desktop or whatever and remove my HDD thats has ben updated to latest firmware in the first place before E3 install.
and i can just put back in my OFW HDD and flash that nor backup of my OFW and be lagit.

take that backup and patch it and then flash it to ps3 nor chip and do the rogero downgrader/ QA flag it and then install CFW of my choice with a differant HDD for CFW.
and doing the same thing wiith the CFW nor IMG and CFW HDD for all my offline fun stuff.

is all this correct? is this safe
or am i supposed to run CFW img and HDD on the E3 nor chip Hence why i need to Cut the trace?

if you have read all this i really appreciate it and thank you.