my $answer_file = ('
[InstallShield Silent]
Version=v5.00.000
File=Response File
[File Transfer]
OverwriteReadOnly=NoToAll
[DlgOrder]
Dlg0=SdWelcome-0
Count=3
Dlg1=SdAskDestPath-0
Dlg2=MessageBox-0
[SdWelcome-0]
Result=1
[SdAskDestPath-0]
szDir=C:\Program Files\Adobe\Acrobat 5.0
Result=1
[Application]
Name=Reader
Version=5.0
Company=Adobe
Lang=0009
[MessageBox-0]
Result=1');

my $pkg = "c:\\acrobat5.exe /a /s /sms /f1$answer_file";
system $pkg;