ATI has released new Catalyst 10.5 drivers for Windows XP, 7 and Vista

New Windows Features

Support for 120 Hz displays for ATI Radeon™ HD 4000 Series and ATI Radeon™ HD 3000 Series GPUs
ATI Catalyst™ driver now supports 120 Hz Displays for the ATI Radeon™ HD 4000 and ATI Radeon™ HD 3000 Series graphics cards

ATI Catalyst 10.5 WHQL Windows XP 32-bit download from Guru3D.com
ATI Catalyst 10.5 WHQL Windows 7 | Vista 32-bit download from Guru3D.com
ATI Catalyst 10.5 WHQL Windows 7 | Vista 64-bit download from Guru3D.com