Is there a new ATT Yahoo browser for the new Vista OS?

Before I upgrade my "Vista ready" machine I'd like to know if there is a downloadable ATT browser for vista. I tried to install the old SBC Yahoo browser on my wife's new Vista maching and it would not take it, she is currently using Internet Explorer as her browser and doesn't like it. We both like the older and simpler Yahoo browser, it doesn't have as much "junky toolbars" on it