eyeChange

If you have EyeTV and Directv, eyeChange is a must have app. eyeChange allows EyeTV to change the channel on a Directv ethernet enabled box over a home network. This provides a nice and clean EyeTV DVR installation. No ugly and cumbersome irblaster or serial cables required. No elaborate hardware configuration or ir codes to worry about.
eyeChange is easy to configure and use and hides nicely on the desktop as an icon in the menu bar.
Configure once by providing the ip address of your directv box then use. Simply schedule record on Eyetv and eyeChange will change the channel on the Directv Box.
Most Directv HD boxes have ethernet ports including
H20, H21, H23, H24, HR20, HR21, HR22, HR24, HR25 and others.