Have you ever tried painting plastic? All Pergo is is a heavy duty plastic over a paper picture of wood over MDF. It won't take paint or stain or anything like real wood will and it certainly can't be painted without an extreme amount of effort. And even should you manage to get paint to stick, you're not going to have this look good for any but a short period of time before it starts chipping, peeling, and looking like crap.

probably best to buy some cheapo laminate flooring and simply change it out every couple of years.(probably cheaper than primer and paint lol) I have seen the stuff for 79 cents a sq ft how can you resist??

wow! okay just a thought