To get the toggles to work with the mattix rom do the following steps
Files you will need:
ODIN for the PC: here
http://www.android-advice.com/file-downloads.php?filename=Odin
EL29 file is here: Rwilco12's Android Repository
NOTE - To get the power button to work in recovery, scroll to the top of the main menu and hit up, down a couple of times it will then say it's enabled, and you can use your power button to click with....otherwise you use the home button, it's your choice.
ROM File: SPH-D710_FK23_DEODEX_ROOT_BUSYBOX_V3.zip - 496.24 MB in the first post is the link for the download.
http://forum.xda-developers.com/showthread.php?t=2023404
Stock FK23 Kernel only: FK23_JB_STOCK_KERNEL_NOCWM.zip
Rwilco12's Android Repository
http://rwilco12.androidfilehost.com/?dir=Kernels/Stock (TW) Kernels/JB/ZIP
Extended Toggles zip File:
http://forum.xda-developers.com/showpost.php?p=35094283&postcount=235
1: Get into into download / odin mode
(hold power+volume down button at the same time, once the logo is there hit volume up and you are in odin mode or as some call it download mode.)
2: flash EL29 safe recovery kernel via odin pc. Put the TAR file in the PDA slot, leave everything else as it is, and hit start. This will flash a safe recovery to use to install things at first with.
3: Once you odin the EL29 file it should reboot to recovery on it's own
4: Install this rom (mattix deodexed Rom file) because for now, that's all the toggles works on. Flash this by installing it via recovery, in "install zip from sd card" (without quotes) section then scroll down to wherever you have placed that file, and once there click it.
5: Once installed reboot to the phone and let it boot fully. You should see the FK23 rom. This is rooted so if you want to stop here that is fine, you just won't have extended toggles.
(This part is for the extedned toggles)
6: once booted fully, reboot to odin / download mode (see step one)
7: flash EL29 again (see step 2)
8: It will reboot to recovery
9: Install Toggles FK.23.Ext.Toggles.Rev2.zip the same way you installed the rom earlier via recovery.
10: flash FK23 kernel
11: reboot phone and enjoy extended toggles.
Well that should be it.
man writing up how-to is kinda time consuming
.
Hope I didn't miss anything.