You're right. Bush will never call for something he calls an "Amnesty" despite the fact that what he is calling for is really a form of amnesty.
What is he calling for?
As I understand it, a Mexican wanting to work in the US can presently wait 10 years for a non-existant green card or cross over illegally. Under a work program a Mexican wanting to wotk in the U.S. Would apply for and receive a work visa so that he could be investigated, tracked, and taxed while he is here and sent home when his work is done. Any Mexican found to be working here after such a "work visa" is implemented will be deported as an illegal.