No dude, you'll need to at least flash Xell first in order to boot linux.
This is how I flashed my last xbox using Gentoo; same method can be used here and should load faster:
-JTAG wire Xbox360
-Solder flasher (I use LPT)
Now in NandPro (I've only done this with 16mb boards, no big blocks yet)
nandpro lpt: -r16 front0.bin 0 50
nandpro lpt: -r16 front1.bin 0 50
This will dump the first 50 blocks o the Nand, and it's where Xell will reside in.
Now compare them with HexWorkshop and if the match, all good.
Now take a xbr.bin just or testing purposes (you'll delete this file after verifying your CB!!!
nandpro xbr.bin: -w16 front0.bin 0 50
After, open this xbr.bin with 360NandDump Tool 0.91 to check your motherboard version, CB, etc.
Once you see that all checks out, delete and destroy this xbr.bin!!! it's not flashable and you'll fuck up so bad you'll cry for the longest time ever.
Now with nandpro, you'll extract your keyvault from front0.bin
nandpro front0.bin: -r16 rawkv.bin 1 1
Once you have this, we will compile a working XBR for your motherboard version and flash Xell as well.
nandpro xbr.bin: -w16 rawkv.bin 1 1
nandpro lpt: -w16 xell.bin 0
All this will be done in like... 10 minutes tops.
How, run Xell, run Linux Disc (I used Gentoo for this) Following the lflash guide.
once you are at the "./a.out backupnand.bin xbr.bin
your 360 will now be working with XBR flashed and all good.
After, take that backupnand.bin and inject your front0.bin like this with nandpro
nandpro backupnand.bin: -w16 front0.bin 0 50
This will make your "untouched" backup of your NAND if you ever need to flash original again.
The rest is magical, like this I don't have to wait 36 minutes for every read and write using LPT and NandPro.
I Hope you like this tutorial. Cheers