I'm more than happy to help!, alright so:
1) Update the recovery to TWRP 2.3.1.0, Micro SD support is a must (in case you accidentally screw up, also recommend you drop a stock rom on the micro SD card before anything)
2) Install
Stock Asus JB 4.1.1 Firmware 10.4.2.13 - Rooted & Deodexed & Busybox version ! (The reason you need Busybox is due that you have to untar some files on the tablet, this made the untar process quick.) Also note that i was not successful at installing this using Hydro 4.1
3) The stock kernel worked wonders for me, i did not install a custom kernel. The stock kernel worked perfectly for this, i recommend you skip installing untermenschs's kernel.
4) After the stock rom is working, copy "linux.tar.gz" to the root of your internal storage on the tablet
https://rapidshare.com/files/201953815/linux.tar.gz
5) Reboot your tablet into fastboot & "fastboot -i 0x0B05 flash staging hybridkernel.blob"
https://rapidshare.com/#!download|15p3|2827313479|hybridkernel.blob|7694|0|0
6)After you reboot back into android, open up ADB on your computer and type
Code:
$ su
# mkdir /data/linux
# tar -xzvf /storage/sdcard0/linux.tar.gz -C /data/linux
This will take awhile just patiently wait till it's done extracting.
7)Create a file called ".boot_linux" and drop it on root of your internal storage on the tablet, then reboot. The kernel will then look for the ".boot_linux" file and when it finds it, you boot to arch linux.
8)I haven't played much with Arch Linux, so i have to figure out the location of internal storage is from linux. But what i did to reboot back into android was to reboot into TWRP and go to Advance > File Manager and delete the ".boot_linux" file and reboot tablet. That will then of course reboot into Android.