Default [Q] Lumia 710 Root,

Hi all,
i know there are many threads of unlocking lumia 800 or 710, but i am confused by reading these, they seems identical but having a little bit difference. i am new to lumia and also new to rooting. i dont want to ruin my lumia so i want you to help me in telling which is the best rooting method for my lumia 710,

here is my lumia detail,

Software: WP 7.5,
OS version 7.10.8779.8
bootloader version

if there is something else need to tell ask me,

and after rooting it will i be able to update it to 7.8 (when available),