I could solve the issue.
The steps are the following:
1).- Download Q2A from
http://www.question2answer.org/
2).- Create the directory in your localhost.
3).- Create the DB.
4).- Copy - Paste the themes that You are importing at themes directory which is in your localhost.
5).- Copy - Paste the plugins that You are importing at plugins directory wich is in your localhost.
6).- Import the BD that your gonna use.
7).- Copy - Paste the rest of directories in your localhost.
These steps are used if You import another project Q2A.