Kleines Script zur Installation von Sparvoip oder Voipbuster. Müsste beides funktioniern, solange man "SparVoip" dürch "VoipBuster" ersetzt oder ne Variable reinmacht.
[autoit]Run("setupsparvoip.exe")
WinWaitActive("Setup-Sprache")
send("{Enter}")
WinWaitActive("Setup - SparVoip", "Willkommen zum SparVoip Setup-Assistenten")
send("!w")
WinWaitActive("Setup - SparVoip", "Lizenzvereinbarung")
send("!a")
sleep(100)
send("!w")
WinWaitActive("Setup - SparVoip", "Ziel-Ordner wählen")
send("{Enter}")
WinWaitActive("Setup - SparVoip", "Startmenü-Ordner auswählen")
send("{Enter}")
WinWaitActive("Setup - SparVoip", "Zusätzliche Aufgaben auswählen")
send("{Enter}")
WinWaitActive("Setup - SparVoip", "Installation durchführen")
send("{Enter}")
WinWaitActive("Setup - SparVoip", "Beenden des SparVoip Setup-Assistenten")
send("{Enter}")
Dazu ein Registry-Lösch Script und ein Programm Lösch Scipt 
Funkioniert nur bei IE5 und WinXP, anderes hab ich nicht getestet.
Hab mir das ma gebaut um auch über die kostenfreien Anrufe hinaus zu telefonieren. Klappt wunderbar nur müssen dazu noch en paar mehr Einstellungen vorgenommen werden 
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$installpath = RegRead ("HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\SparVoip_is1", "Inno Setup: App Path")
$username = StringSplit(@UserProfileDir, '\')
FileDelete(@WindowsDir & "\Prefetch\" & '*SPAR*')
FileDelete(@HomeDrive & "\vcs5BGEffects\" & '*Spar*')
FileDelete($installpath & "\" & '**')
DirRemove(@UserProfileDir & "\Anwendungsdaten\Microsoft\Crypto\", 1)
FileDelete(@UserProfileDir & "\Cookies\" & '**')
FileDelete(@UserProfileDir & "\Lokale Einstellungen\Temporary Internet Files\Content.IE5\" & '**"')
FileDelete(@UserProfileDir & "\Lokale Einstellungen\Temp\" & '**"')
FileDelete(@UserProfileDir & "\Anwendungsdaten\SparVoip\" & '*History*"')
DirRemove (@UserProfileDir & "\Anwendungsdaten\SparVoip\" , 1 )
DirRemove ($installpath & "\", 1)
RegDelete("HKEY_CLASSES_ROOT\callto\DefaultIcon", "")
RegDelete("HKEY_CLASSES_ROOT\callto\shell\open\command", "")
RegDelete("HKEY_CURRENT_USER\Software\Classes\callto\DefaultIcon", "")
RegDelete("HKEY_CURRENT_USER\Software\Classes\callto\shell\open\command", "")
RegDelete("HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run", "SparVoip")
RegDelete("HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\MUICache", "C:\DOKUME~1\" & $username[3] & "\LOKALE~1\Temp\is-0ICUC.tmp\setupsparvoip.tmp")
RegDelete("HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\MUICache", "C:\DOKUME~1\" & $username[3] & "\LOKALE~1\Temp\is-CQPP3.tmp\setupsparvoip.tmp")
RegDelete("HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\MUICache", @UserProfileDir & "\Desktop\setupsparvoip.exe")
RegDelete("HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\MUICache", "C:\DOKUME~1\" & $username[3] & "\LOKALE~1\Temp\is-F4FTP.tmp\setupsparvoip.tmp")
RegDelete("HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\MUICache", $installpath & "\SparVoip.exe")
RegDelete("HKEY_CURRENT_USER\Software\SparVoip")
RegDelete("HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\SparVoip_is1")
RegDelete("HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List", $installpath & "\SparVoip.exe")
RegDelete("HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List", $installpath & "\SparVoip.exe")
RegDelete("HKEY_USERS\S-1-5-21-1220945662-682003330-839522115-1003\Software\Classes\callto")
RegDelete("HKEY_USERS\S-1-5-21-1220945662-682003330-839522115-1003\Software\Microsoft\Windows\CurrentVersion\Run", "SparVoip")
RegDelete("HKEY_USERS\S-1-5-21-1220945662-682003330-839522115-1003\Software\Microsoft\Windows\ShellNoRoam\MUICache", "C:\DOKUME~1\" & $username[3] & "\LOKALE~1\Temp\is-0ICUC.tmp\setupsparvoip.tmp")
RegDelete("HKEY_USERS\S-1-5-21-1220945662-682003330-839522115-1003\Software\Microsoft\Windows\ShellNoRoam\MUICache", "C:\DOKUME~1\" & $username[3] & "\LOKALE~1\Temp\is-CQPP3.tmp\setupsparvoip.tmp")
RegDelete("HKEY_USERS\S-1-5-21-1220945662-682003330-839522115-1003\Software\Microsoft\Windows\ShellNoRoam\MUICache", @UserProfileDir & "\Desktop\setupsparvoip.exe")
RegDelete("HKEY_USERS\S-1-5-21-1220945662-682003330-839522115-1003\Software\Microsoft\Windows\ShellNoRoam\MUICache", "C:\DOKUME~1\" & $username[3] & "\LOKALE~1\Temp\is-F4FTP.tmp\setupsparvoip.tmp")
RegDelete("HKEY_USERS\S-1-5-21-1220945662-682003330-839522115-1003\Software\Microsoft\Windows\ShellNoRoam\MUICache", $installpath & "\SparVoip.exe")
RegDelete("HKEY_USERS\S-1-5-21-1220945662-682003330-839522115-1003\Software\SparVoip")
RegDelete("HKEY_USERS\S-1-5-21-1220945662-682003330-839522115-1003_Classes\callto")
RegDelete("HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List", '*spar*')