Compaq presario cq56 can you put dual core in it and is it able to play world of warcraft.?

I've had the same laptop as you for about 8 months now, who ever sold it to you lied, it is terrible for playing games, I played wow, i had to play it on all of the lowest settings, and it would still get pretty laggy when raid time came around. You probably won't be able to upgrade it in anyway except for adding a couple gig's of ram, which really wont be very helpful at all when it comes to gaming. intels IGP is weak and beyond a certain point no amount of dedicated RAM will increase performance because the IGP is to slow to access it.