Changes
no edit summary
UpdateInterval=2 means "Once a week"
UpdateInterval=3 means "Once a month"
Instead of using the "regedit" line and a separate pdfcreator.reg you can use this line:
<install cmd='REG ADD "HKLM\SOFTWARE\PDFCreator\Program" /v "UpdateInterval" /t REG_SZ /d "0" /f' />