Alex,
Great advice from Paul and Fanman. As one who taught himself (Fixed Wing) aerobatics from a book and took down the wisdom of others over a beer, I can HEARTILY recommend taking qualified advice from an instructor on this an any other extreme manouver. It might cost a little more but you pick up the skills before you find yourself in a position requiring prompt execution of a recovery manouver that you have not formally learnt.
The forum isn't the best place to pick up your flying lessons, in fact it can be dangerous as both Fanman and Paul imply.
Let someone who knows what they are doing train you properly, imagine how scary it is going to be trying to remember (perhaps conflicting) advice from a forum as you get nearer and nearer the ground pulling 2-4g wrapped into a spiral.