Yo.
You don't need to enter SP to enter WILD, and in fact, it's not possible to actually induce that state unless you have sleep disorder with same name, normally it happens only once or twice per lifetime, if it ever happens. http://www.dreamviews.com/wake-initi...explained.html
Also check out WILD for more in-detail WILD tutorial.
And be sure to check out http://www.dreamviews.com/introducti...-dreaming.html too, some nice general information about lucid dreaming there and collection of tutorials.
Good luck on your journey into lucid dreaming.