Backtrack has all required tools for PenTesting. you can install Teamview in Backtrack also.
Teamviewer:
Teamviewer is legal Remote Administration Tool[RAT]. Using Teamview you can control your friend’s system from your computer.
Visit Teamviewer official site:
http://www.teamviewer.com/en/download/index.aspx
Download .deb file
Copy it to desktop.
Open the Terminal
and type the following command:
sudo dpkg -i /root/teamviewer_linux.deb
It will install the Team viewer. Enjoy.
Having doubts? Feel free to comment.