Customize iCal invite Email text + subject

Hi everybody,

want to customize the Email design for business purpose.

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Subject = Event invitation: Sales figures, thurs. 27.06.2012

Email content =

"Full name" has invited you to an event: Sales figures, thurs. 27.06.2012. To accept or decline this event, open the attached invitation. If you can not open this file, please just respond to this Email, if you can attend the meeting.

Thanks.

Kind regards

Signature

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I found this:

System/Library/Frameworks/CalendarStore.framework iTip.strings -> here it is possible to set strings

And I tried to set the date:

/Applications/iCal.app/Contents/Resources/Mail.applescript

set subjectLine to subjectLine & begDate

But !!! so changes to this file will not be reflected in iCal behavior unless manually recompiled.-> how to do this?

But:

1. where to set the date in the subject?

2. how to include the date in the email content?

3. how to include the signature?

4. where to set the style?

Anybody an idea? Developer welcome to contact me.

thx