Actually those links I provided are very good for the how to beginner on building one. And its true I didnt see that you were kidding, I thought you basically called me a liar, my apoligies.
http://www.sfgate.com/cgi-bin/article
....Advertisers hate TiVo, and here's why: Select Play Select 30 Select. That's the sequence of buttons discovered by hackers that will program TiVo remotes to skip ahead through recorded TV programs at 30-second intervals, thus wiping out commercials far more effectively than merely fast forwarding. (Tip: To do the hack, you have to be pointing your remote at the TV while a recorded program is playing. You'll hear three dings if you do it successfully. Now the Advance button that normally jumps to the end of a show can be used for 30-second skips.) TiVo responded this week to advertisers' complaints by introducing a service that the Alviso company believes will put their fears to rest: commercials on demand. The service, premiering next spring, will allow TiVo users to enter keyword searches into their boxes. The box will then seek out and record relevant commercials (thus eating up storage capacity), and the user will be able to watch the commercials as many times as he or she pleases. It is, in other words, something many TiVo subscribers will see as a laughable idea.