To download successfull, I use Firefox with a add on called "Down Them All'. Its a download manager that overcomes your download problems. As far as installing the manual SP1 so called "patch", I have had alot of trouble with it. I ended up uninstalling what I could, manually deleting the rest as the Trainz uninstall does not work correctly after installing the "patch". I tried installing the "patch" without the initial program being installed, it worked. Had to change the target directory from "...../unknown.app" to "....../TANE". Also had to manually create new shortcuts. Not sure if software jockeys will approve but I cannot find any instructions on the web site(s). Good luck. I can run the program. It works well.