The above file should work with XP or vista 32 bit Operating System's, it just would be different for a 64 bit based Operating system as the programs path would have to be (x86) for a 64 based system. So the file above will work for you with XP 32 bit including media center edition.
So use the above and follow the directions in the first post of the thread "Ignore the one file with the extension .ahk in the above archive, it is just the source file, Not Needed, only use the HD_starter.exe file" as I said in the plugin configuration make sure to use the full path to the HD_Starter.exe file also you should make sure to give the button a name in the configuration, as well make sure that the plugin is enabled in media portal plugins config and the button is added to your home screen in your skin.
You shouldnt have any problems.
So use the above and follow the directions in the first post of the thread "Ignore the one file with the extension .ahk in the above archive, it is just the source file, Not Needed, only use the HD_starter.exe file" as I said in the plugin configuration make sure to use the full path to the HD_Starter.exe file also you should make sure to give the button a name in the configuration, as well make sure that the plugin is enabled in media portal plugins config and the button is added to your home screen in your skin.
You shouldnt have any problems.