The link you gave me pointed me to this one:
That pages contains all types of variations of AdventureWorks (x86, x64, DW, OLTP, etc). I downloaded "SQL2008.AdventureWorks_All_Databases.zip" and when I unzipped it it created two folders, Samples and Tools.
The databases are not in Samples folder (fooled me) but in Tools\Samples\
(For AdventureWorks 2008 OLTP run the script instawdb.sql to kick off the install. Also the t-sql must be run from sqlcmd mode and FILSTREAM and FULL TEXT SEARCH must be enabled BEFORE the script is run.)