[dba-SQLServer] Installing Adventureworks Databases

I recently reinstalled  a bunch of things on my notebook, including SQL
2008. I downloaded both the Adventureworks.msi file and the zip. The MSI
file errors out almost immediately with the message:

The installer has encountered an unexpected error installing this package.
This may indicate a problem with this package. The error code is 2738.

So I unzipped the zipped version and got a pair of directories called
Samples and Tools. Tools contains a subdir called Samples which in turn
contains a bunch of subdirs filled with CSV files. But there are no
instructions as to what to do next, or what order to run the csv files in.

Any advice?

TIA,
Arthur