X-COM Area 51 Alpha Beta Mod Instructions Before unzipping the Alphabeta.zip file, remember to create backups of the Maps, Routes and Terrains folders in your UFO directory in case you want to bring the game to its original configuration. The mod will also includes a modified XComUtil.cfg file necessary to run the extra buildings - if you want to return to the original settings you should create also a backup copy. There shouldn't be any problems but remember: use these files at your own risk (and create backups in case something goes wrong). Unzip the mod to your UFO folder and click Yes to All when it asks you if you want to replace the files. Run XCSetup (remember you'll need version 9.51). Choose the options as you like but in the "Do you wish to be prompted before a ship attack" you must choose Yes. Click on RunXCom to start the game. Send a plane to a Terror site or to a Large Ufo landed/crashed and when the prompt appears choose terrain 5 - Urban. Have fun :)