Here it is and now it's possible to do!! You can skip ALL child dungeons and we can done more awesome stuff with this awesome trick!!! First of I like to thanks two peoples. Without them this could be never possible! Samoth to his acute angle with sidehop!!
http://www.youtube.com/watch?v=71pCMO4eidk

And Yautja for his sidehop glich!!!
http://www.youtube.com/watch?v=JDQ1jCHAXTY

I will tell you how to do this later. I did this on my own and I know AKA discovered this before me but still I found it on my own I've sacrificed 13 hours for this!!! So I think AKA should get credits!! But I did it too?.... Okay Good job with this AKA and Kazooie!!! ^_^

Enjoy!!!!

Lets see in future what this trick hold for us! NA I like to notice with practise this is easy to do on console ^^.
Here is AKA's video:
http://uk.youtube.com/watch?v=suFAge6UCQQ
AKA said it's tas only. I don't think so. My video is done on N64 in real time.And sorry about forest stone. I was too lazy to do escape forest glitch :D

Okay how to do this:
1.First get link along to wall just like in video and press Z to aling yourself along to wall.
2. Now turn around to push control stick a little bit down. And use first person view to set your B button left side along with pillar like in video.
3. Now walk forward when you almost hit the wall. (You must walk forward because camera angle isn't right without it!!)Press Z and hold it down and walk back to point where you started!!
4. This is tricky part! I recomend to get trought of wall few times before attempting jumpslash! To get side way roll to left you need to push control stick so little bit down and left. I mean between left and down!. When link walks a little bit and A button say "Attack" you are all set. But if A button say "jump" don't push your control stick too much between down and left. A button command sould change.
5. when you do step 4 corretly link should do little left side roll. When link is going that roll you need hammer you A button and you need to hold control stick down to do backwards sidehop. If you done it right link should go trought of wall. Problem in here is if you press A too late link will do sidehop in wrong direction which is hard too see in that camera angle. So keep trying and you will see the difference.
6. When you are sure about that link will go trought of wall you just need to do jumpslahs and that is easy part! If you get too close to the DoT wall you will be pushed back! so try press it later ^^. And one very importat thing!!! If you get your sword out you need to put it back to do roll again and make sure you take those all steps again! becaus camera angle isn't same anymore!!

Feel free to ask if you have questions about this!! I hope you get it to work and put you work to this what other stuff we can do this awesome trick!!! Next OoT speedrun will be awesome!!!

Have Fun!!!!! ^^ (less info)