Shareaza
Get Shareaza here.
Copy the Shareaza installer to: \$OEM$\$1\install\Applications\Shareaza\
Add these lines to your batch file:
ECHO. ECHO Installing Shareaza 2.2.1.0 ECHO Please wait... start /wait %systemdrive%\install\Applications\Shareaza\Shareaza_2.2.1.0.exe /verysilent