I apologize gentlemen for reopening this topic. But I myself am having trouble launching Zero Hour after installing First Decade. I went through the usual Compatibility changes that one would do. I even tried the extracting files that Mr. Tore had suggested. Seemed to work for Mithrane, but it tells me that I have to insert the correct disc, which First Decade is still in. So I am a little puzzled as to what went wrong here. As to what was happening before I tried the extracting files Tore had provided, I was having the same issues as Mithrane, would look like it was launching and would just close as if nothing was happening or would say a serious error had occurred. I am running a Windows 7 Professional 32-bit system. Any help would be appreciated, thank you.