I believe the higher the contrast, and brightness around 55, breaks the set in a bit quicker(100-120 hours as opposed to 150-200 hours). But yeah, I think your set has a SD card slot. Id use it rather than risk the xbox failing(as many have done) and getting burn-in at least or serious IR.
i found it . honestly the 3 rings wouldnt be bad, lol. microsoft would either fix it but more likely send me another for free. im still within the 3 year fix window. Plus the disc drive is not running for the break in, its not a disc. but i did cave and dl the file and use the sd card method. i forgot about 1 thing, power.. less electricity.. lol
So one of the reasons I encourage the breakin slides is that they're something put together by the community to help each other out. Whoever put it on xbl basically just took something public domain and is charging people for it, plus I doubt whoever made the app has good programming form. With slides there's no potential programming glitches that could freeze things up.