I like how it turned out wolfspeaker!
You need the proper tools to ventilate lace.
The needles. You need one that does 1 and 2 hairs at a time for a lace front.
http://www.hisandher.com/Ventilation_Needles-list.aspx
And the holder for the needle.
http://www.hisandher.com/Ventilation_Holder-list.aspx
Here's a tutorial on how to tie your hairs.
http://www.makeup-fx.com/Perukeng.html