After you unzip the file you need to run a RESTORE command. If you're getting particular errors with the restore, please post them. If you're really unsure how to use the restore, here's an introductory article on backups & restores that might help.
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
- Theodore Roosevelt
Author of:
SQL Server Execution Plans
SQL Server Query Performance Tuning