Disable Picasa Updates

To disable updates add this commands to user startup script:

reg add HKCU\Software\Google\Picasa\Picasa2\Preferences /v AutoUpgradeCheck /t REG_DWORD /d 0 /f
reg add HKCU\Software\Google\Picasa\Picasa2\Preferences /v AutoUpgradeAsk /t REG_DWORD /d 0 /f