I'd seriously reconsider that. Again.
If you can't find a safe clock speed, then don't start overclocking it.
As I said in your previous post, it's a bad idea. You're gonna get maybe, at most, a 1% increase in performance, which means nothing in the real world. Even overclocked on a desktop, that chip couldn't handle many of today's games.
Plus, is it worth risking the laptop to get that maybe 1% extra? If it fries, it's gone, and the warranty will mean nothing since you overclocked it.