Switching between Monitor and 40" TV

Is there a remote control that would allow me to set a macro for my computer and TV? Or do remotes work just with components? I am somewhat light on components -- all I have is a cable box -- the intention was for the computer to handle the rest (pertinent specs below).

Last night, for example, I wanted to pop in a DVD. To do that, I had to change the source on my TV by clicking the "source" button on my remote some 3-4 times, change the audio output on my PC by double-clicking the "sound" icon and then right-clicking HDMI and selecting "set as default." I have a shortcut set up for switching between me displays, so the only remaining step was to press "alt-f1" two times to get the picture on my TV rather than Monitor. If I wanted to continue to surf the web while watching my movie, I would have to go to display setting and manually extend my desktop onto my monitor. Now, when I switch back to my monitor, the display defaults to 1024 x 768, which looks atrocious on 24", and I need to switch my sound back to speakers. This is WAY too much work to watch a single dvd. There has GOT to be an easier way!

Specs
Q9450
HD4870
24" LCD Monitor Samsung 245BW
40" TV LNT-4065
Sony Blu-Ray player
Pioneer DVD reader/writer