My case was not same as #1, but still agreed to the subject line - A black screen during installation. It happened when the setup is supposed to be completed (Extraction and configuration completed) and a black screen was shown after the startup screen saying starting the Windows for the...
What driver are you actually using now that works? Pre-release driver from Windows Update or win7 driver from ATI based on 8.12? My case is similar to yours. I am using HD2600XT and have 6GB of RAM with Windows 7 beta installed (64-bit version 7000). The initial Microsoft driver worked with...