How do you boot a CD drive first before HD

How do you boot a CD drive first before HD
What button do you press on a laptop (Dell e1405) to have the CD drive boot first, before the hard drive...

Consumers Plug Into Electronics Deals (Investor's Business Daily)
Investor's Business Daily - The prospect of cheap HDTVs and notebook computers was enough to convince many consumers to wait for hours in line outside U.S. retail stores Friday for early bird sales.

OLPC asked to free XO laptop (InfoWorld)
InfoWorld - As commercial sales of One Laptop Per Child's XO laptop close Monday, a user tracking the nonprofit effort said continued commercial availability of the laptop could benefit OLPC's nonprofit effort, the XO manufacturer, and children using it as a learning tool.

It begins: Dell and Blizzard teaser page is up
It's safe to assume that Dell has found a new way to market its XPS gaming line of notebook computers with the blessing of Blizzard, but how...