[ubuntu] Can anyone please help me upgrade to ATI Catalyst 10.3?!

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http://ubuntuforums.org – Hello there, I'm using Ubuntu 9.1 32bit on Acer Aspire 5542 and my GPU is ATI Mobility Radeon HD 4200. I activated proprietary drivers and am using them now but I wanna update them. I found out I can update to Catalyst Control Centre 10.3 and have been trying the whole afternoon doing it. Basically, I read up this https://help.ubuntu.com/community/BinaryDriverHowto/ATI and it's completely hopeless to me. My current fglrxinfo is following. display: :0.0 screen: 0< (Hardware)