For some reason the original attachment has gone missing. However, it's very easy to do this without needing any files:
1) Start, Run, "regedit".
2) Navigate to "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Media Center\Display Settings" in the treeview
3) Right-click in the right-hand pane, "New", "DWORD Value". Set the name to "DisableDxCheck" (without the quotes), then double-click it and set the value to 1.
4) Right-click in the right-hand pane, "New", "DWORD Value". Set the name to "DisableDx9CapsCheck" (without the quotes), then double-click it and set the value to 1.
5) Start Media Center, and it should start in full mode... but you may experience some strange effects and stability problems if your video card is not up to the job.