It's very difficult to find a laptop that can easily be turned into Hackintosh. As mentioned in our Hackintosh compatibility guide, most laptops aren't good Hackintoshes, because the compact design of laptops makes it very difficult to replace non-compatible parts.
With this in mind, I've compiled a list of Hackintosh-compatible laptops, all of which can run OS X Mountain Lion without the need to replace any hardware. As expected, many of the laptops on this list were also on our previous list for Mac OS X Lion-- after all, the hardware requirements between Lion and Mountain Lion are relatively similar. Most of the guides provided below are from tonymacx86, and have files attached to them. To view and download attached files on tonymacx86, you have to register an account on the website.