Yup,this is the post to use for 2.3.4. The chances of bricking really are slim to none,if you follow the directions.
Just read thru the directions a couple of times and ask any questions you can't find the answers to prior to getting yourself in a bind. Download all the files,check their ms5s,and organize yourself so you can find them all. Don't skip the part about checking ms5s because you don't understand it,or know how to do it,as using corrupt files is the only way you *could* potentially brick it.
Once you've downloaded and checked everything,just carefully procede. Make sure the outputs match and you don't miss any steps,and you'll be fine.