i don't know much about computers...but i had an s3 prosavage ddr in my computer allready installed and my friend gave me his ati radeon 9200 128mb bcus he had upgraded his computer. and i uninstalled the s3 prosavage ddr thing in my computer and everything shut down and restarded then i turned it off and put in the ati card and installed the software and later as i installed halo for pc the thing said i had an s3 prosavage ddr crap installed and i guess it doesnt detect the ati card... does anyone know what im doing wrong? 
thanks in advance
thanks in advance