Having a Problem installing Safestrap recovery

Im having a problem getting to the recovery screen of safestrap.

I just installed safestrap from this link here http://xdaforums.com/showthread.php?t=2605648
and it said it was successful. When I clicked Boot into Recovery, the phone restarts and just hangs at the Samsung Galaxy SIII Screen.
pressing any of the keys, or trying to power it off does not work. I have to pull the battery.

Upon pulling the battery, I do get the safestrap overlay where it says safestrap is disabled. I click the menu button that says recovery and it just hangs on a black screen. And I need to pull the battery again. When i get back to the safestrap screen again, i can get my phone to boot as normal by clicking continue as oppopsed to recovery, but I still can not get safestrap to boot into the recovery screen to install a rom (I want to install a 4.3 Rom).

Does anyone have any advice? Im currently running on a rooted 4.1.2.

PS: Is there a rooted stock 4.3 rom? I dont have alot of experience with custom roms. I just want the latest stock rom, but have root access. If there is one, can someone please point me in the direction of it?

rslthara very

So wait... Do I even need safestrap then? or is there a way to install 4.3 without having my bootloader become locked. I thought that was the whole point of installing safestrap was to create a partion of the update before you actually update to it.

Gturvis mingled

Thank You. I guess I missed something when I was reading on how to avoid getting your bootloader locked in the process.