[Galaxy S III I9305 (4G LTE + 2GB RAM) Android Deve] btemtd:
First of all I am the one who made this guide with all the links to the appropriate places, You cannot see this? LOL

Anyways.... You asked

" Is there a special “rooting” software I should be using it or is “rooting” just a process name (like “flashing” a drive for example)? It might help me if I could have some noob instruction on how to root an i9305 without bricking it.

B) If I “root” my phone at this stage (without having made any backups other than the xxxx.qcn file) do I risk bricking my phone and not being able to revert to the stock OEM i9305 software?"

A)There is no special rooting software, its basically a file which you flash onto your phone which gives you the root access. If you follow the instructions 100% and nothing on your side fails well then you should not brick your device, reason people brick is becuase they have done the wrong thing or have flashed the wrong thing or it could be bad flash files. But I can confirm none of these files are bad as they have all been used with success.

B) we would hope that the qcn is enough, but maybe not. Only because we have not seen it happen yet, everyone who has lost imei so far has made the mistake and not made any type of backup, But lyriquid says JUST TO MAKE SURE you should also backup those partitions after u root just incase it comes to the point where you need them.

You want a Noob instruction on how to root without bricking it? ummmm What the hell is that! LOL Mate this guide is almost as NOOB as it gets, and OF COURSE if you follow this guide and all the links you wont brick it.

Reason you want root is this will then allow you to further back up the partitions and also allow you to make a nandroid (FULL BACKUP) of your current software/ROM

Only way to do this FULL BACKUP is by having CWM installed:

CWM is NOT firmware it is only recovery module, CWM will only replace your stock recovery module it is Only 7mb. it will NOT replace your stock firmware. Also this recovery module has much more capabilities then your stock recovery. It will also allow you to flash Mods, tweaks,roms if you wish to do so in the future.

Even if you do all of this you can still even return it back to OEM with stock recovery firmware and UNROOT. anything is possible. So my recommendations if you want to start flashing software and want to backup your rom is to follow my steps fully in this thread and click on the links and follow those guides as well. Each link will guide you as well. Once you have root and CWM installed and you want to make a FULL BACKUP of your OEM Softwareall you need to do is boot into recovery mode, then choose Backup/restore and then >>> Backup Thats it very simple which is why i didn't include it in the thread because as soon as you go into recovery mode you will be able to figure it out yourself

By the end of all this procedure you will have

Rooted Stock OEM software + CWM REcovery

EDIT: I reccomend you do what the full guide says, and install a terminal emulator because you dont need to learn code Lyriquidperfection has written down exactly what you type inside the terminal and thats IT your done. Its that easy!!!