1) theoretically, yes.
2) as far as I know, yes.
Unfortunately downunder35m seems to have dropped off the scene now but his write-up in his "universal" post is reasonalbly clear.
As long as you have a full backup of your device you can't really brick it so give it a try (after re-reading all the stuff including others comments/feedback/tips etc in those threads)
PS if/as/when you get further queries/problems, why not post them in that particular thread anyway.
Please do not post "thanks" but use the "reputation" star(*) bottom/left or "like" bottom/left buttonsS i m p l e s
PS If you find any dead links on MY posts please pm me & I'll try to fix/reload