To program buttons on the remote control by using the learning feature
1 Place the remote control for Media Center PC head to head (2 to 3 inches apart) with the remote control from which it is learning.

2 On the remote control for Media Center PC, press and hold the DVD MENU and OK buttons at the same time until the remote control lights turn off (2 seconds). The remote is now in learning setup mode.

3 On the remote control for Media Center PC, press and release the TV, VOL +, or VOL – button, depending on which command you want it to learn. The remote control for Media Center PC lights blink once to confirm the selection.

4 On the remote control that is teaching the command, press and hold the button that you want the corresponding button on the remote control for Media Center PC to learn.

The remote control for Media Center PC lights blink twice to confirm the selection. If the remote did not learn the command, the lights blink quickly four times. To try again, repeat steps 1 through 4.

5 Repeat steps 1 through 4 for the other buttons that can learn commands.

To restore the default remote control settings
1 Press and hold the DVD MENU button and LEFT navigation button at the same time until the remote control for Media Center PC lights turn off.

2 Press the OK button.

The remote control for Media Center PC lights blink twice to confirm that the buttons have been reset. The TV button will have no command assigned to it and the VOL + and VOL – buttons will adjust the Media Center PC system volume. If the default settings were not restored, the lights blink quickly four times. To try again, repeat steps 1 and 2.

Update:
Link to the manual (PDF).

If you have a media center you must have the WebGuide 4. It enables a web interface for your media center, some of the features is:

Guide

You can manage your the guide like on your media center but here it is possible to se a large list of channels at the same time, use colors on different categories of shows. It is also possible to schedule recordings.

Other features

• Search
• Recordings
• Pictures
• Music
• Videos

WebGuide4 is a free get it here

I had a problem with my mediacenter the Media Status Aggregator Service (ehmsas.exe) crashes often.

Solution:

Go to c:\windows\eHome\

unreg the ehmsas.exe and red it agin:

Type: ehmsas.exe /unregServer
Type: ehmsas.exe /regserver
Restart Media Center

It solved my problem with the service.

If it does not help try to run the following to rereg all MCE components:

Start >run and type in: cmd

in the Command Prompt window type the following commands and press the Enter key after the each command:-
Type: regsvr32.exe atl.dll
Type: cd \
Type: cd windows
Type: cd eHome
Type: ehSched /unregServer
Type: ehSched /service
Type: ehRecvr /unregServer
Type: ehRecvr /service
Type: ehRec.exe /unregServer
Type: ehRec.exe /regserver
Type: ehmsas.exe /unregServer
Type: ehmsas.exe /regserver
Restart Media Center