how to:- rooting without unlocking bootloader

[sagnik88]

i found a thread on xda developers about rooting without unlocking the bootloadder, but i dont really understand the process, when i asked that developer he didnt helped, so i am posting here so that somebody here can help me in explaining the steps of how to do this.

http://forum.xda-developers.com/showthread.php?t=2249077

along with this i have another issue, which is that my phone isnt getting onto fastboot mode(power+vol-up), the led light shows blue for 2-3 sec  then it starts green n starts charging, i have checked the drivers seems all up to date, please somebody help

[Uliwooly]

do you have ICS or JB?

[sagnik88]

jb bro

[Uliwooly]

were you trying this?

http://forum.xda-developers.com/showthread.php?t=2249077

[sagnik88]

yes 1st one

[Uliwooly]

how about this

http://forum.xda-developers.com/showthread.php?t=2250101

[sagnik88]

you know me, i m a noob in this n it seemed too complicated

[Uliwooly]

this is how to flash (check the video and/or pictures)

http://talk.sonymobile.com/thread/41609

[sagnik88]

hey here they talking .75 generic, i have .54 gereric my own, can i use it?? or i need to use .75 only??

[Uliwooly]

you have to download and flash that firmware.