The firm said it allows you to boot Lindows OS 4.0 from a CD drive by a simple restart. The cut down OS includes hardware detection, plug and play, multimedia support and real video.

Although the Linux based OS got some bad press at the beginning (haven't tried it myself yet - review link), I believe they're making a great job offering a linux alternative to the average user with a more complete suite of software, or in this case, a CD you can boot anytime.
Lindows is including the disc for free with the full version of the OS, or you can buy it separately for $30.