I want to run a update exe file from cd-ROM, and it need to set the file's [XPSP2] compatible in the registry to run without error, the cd-ROM drive mount as D, but set exe path as [D:\verup.exe ], Value as [XPSP2] in the next layer, it doesn't work. HKEY_CURRENT_USER\Software\Microsoft\WindowsNT\CurrentVersion \AppCompatFlags\Layers The right path might be something like [SIGN=1D78E30 verup.exe] ... I don't know is there any rule about that, could somebody help me that how to set the path name about the files in cd-rom( when the cd drive is not D... )? -- begin_vista Posted via http://www.vistaheads.com