You mean this ATI adapter for 8.99 + shipping?
http://www.newegg.ca/Product/Product...82E16814998003
if you right click on your desktop > properties > settings, the drop down box doesn't show the integrated graphics ont he MB? I believe it's there you can change your output.
If it's not there, you can try detect new hardware in device manager. If that doesn't give any results, you could always try installing the drivers manually by going to the MB's website and downloading them.