I may have trouble with the admonishing and modesty part, it seems to me people don’t like being admonished no matter how i deliver and i get flack for thinking i know it all

Well, in short, I don't think anyone would take offense at your being modest (humble) but if he's wrong looking for answers in the wrong place by consulting that rambling protestant, why not admonish him? The truth can't hurt him. If he doesn't want it you wasting your precious time on him.

My friend who was basically atheist until a few years ago finally woke up to Christianity, he says largely to do with our back and forth discussions.  Now he has been taken in from some heretic pastor from Church of God international. One of their heretical beliefs is that at death we remain asleep and only until Jesus’s second coming will we awake. 

That heretical belief basically puts paid to Purgatory. As Pax said in reply 1, these protestants will run you ragged with Bible quotes, so I would suggest that, if you do continue, that you should tackle the Catholic questions as Pax suggests. Be well armed though with Catholic teaching and be prepared to back them up with scripture.
The alternative is to offer him your prayers and invite him to contact you when he's ready. Obviously you had some influence in leading him away from atheism. Prayer may be the only option.