1.First, we need to make a folder for Joomla!. Open the folder that you installed
XAMPP into – usually C:\XAMPP or C:\Program Files\XAMPP on Windows.
2. Open up the folder “htdocs:”
3. Create a new folder in “htdocs” titled “joomla15.”
4. Now we need to download the latest copy of Joomla! 1.5 from the net. Go to http://www.joomla.org and scroll down the left hand side to find “Download Latest” and click on “1.5” to open the download page:
5. Then choose the file with the “.zip” ending:
6. After completing the download, use your favorite program to unzip the files into the “joomla15” directory that we created:
Great! Now we are ready to setup Joomla!.