Oh im not worried about after the 5 hours of asleep, ive done a WILD that way successfuly. Just wanted to know if its also possible before 5 hours of sleep. And since you said It's possible, I have no choice but to try it out, just for the heck of it =P

btw, actually, rather than 5 minutes, I heard it was a better idea to stay up for about 30-60 minutes. On my first successful WILD I stayed up for about 40 minutes before getting back in bed.