Easily switchable audio outputs?

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Hey there folks. I posted this in the audio section and I got no assistance in this matter, so I thought I would post this in the General Hardware section.
I'm setting up my mother's computer to be able to use her 32" LCD TV as a secondary monitor (netflix instant play and other online video usage) and I was wondering if anyone knew of a way to easily switch the audio output from the motherboards onboard audio to the video cards HDMI audio output. I want to make this really simple as she doesn't know much about computers.

I know normally you would go through the control panel and switch the audio output in there, but I feel thats gonna be too difficult for her to do each time and frankly, she won't use it if its a hassle.

PC specs are as follows:
AMD64 X2 4400
ASRock ALiveNF6P-VSTA
Kingston ValueRAM 2 x 512MB PC2 4200
GIGABYTE GV-R435OC-512I HD4350
Samsung 20x DVD burner SATA
WD 80GB SATA
Windows XP Home edition

Any assistance in this matter would be greatly appreciated. Thank you!!!

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Admin Edit - link to post in Computer Audio:

http://www.hardforum.com/showthread.php?t=1423192