There's some good news for the PC players of Left 4 Dead 2. You no longer have to worry about whether Valve will be bringing the original Left 4 Dead campaigns into the sequel. You see, crafty modders over at l4dmods.com have already implemented the original maps into Left 4 Dead 2. Valve hasn't actually released an SDK for Left 4 Dead 2 yet, so making this mod work will require users to change some files in the original game (and yes, you do have to own both games to make it work). There are some known issues and bugs and, needless to say, it's not the most user-friendly mod out there, but it's probably a small price to pay for the dedicated users.
So, if you want to see a Spitter on the roof of Mercy Hospital (and we know you do), you can. Watch a video of the mod in action after the break.