Hi Rathna,
Currently, ACE is available to invited users who have already sign up through the above interest form.As ACE is in beta, we are still working out some of the compatibility issues and there are support groups where feedback is welcome.
It can be installed on XP and Vista with no issues, it currently uses CSV or XLS (Excel 97-2003 workbooks) for the output/input files. I know that right now, x64based versions of Windows will not be able to use the tool at this time.
Thank you,
Brian H - MSFT