You’ve gone out and downloaded all of the perquisites for an offline SharePoint 2010 installation either by hand (or with a handy script) and you’re getting errors related to some of the files you downloaded? Yep, SharePoint is picky. For some reason or another the PrerequisiteInstaller really needs a super special version of the Microsoft SQL Server 2008 Analysis Services ADOMD.NET installer or else you end up with an error similar to the following:
Microsoft SQL Server 2008 Analysis Services ADOMD.NET: installation error
What’s an IT Pro to do? That’s right, go out and download a different version. A working version of the x64 msi can be obtained from Microsoft SQL Server 2008 Feature Pack, October 2008 or Microsoft SQL Server 2008 R2 Feature Pack (depending on your target version of SQL Server).
Or, better yet: