PTK forensics is a new graphic professional interface based on other advanced technologies; it offers numerous features such as analysis, search and management of complex digital investigation cases. If you are using backtrack 5, than there is no need to download PTK because it is available on backtrack5.
MySQL server 5 or higher
Apache web server 2 or higher
Web browser (Mozilla, Safari)
After downloading, move to your apache www directory and extract the package. Open browser and use the URL to start installer page.