Hans Van Der Zalm:
Thank you for your post.
At this time, FileMaker Pro will not overwrite existing functions as it may destroy existing data from the original function.
Please enter your suggestion into our Feature Requests web form at:
The suggestions entered into this web form populate a database file that is hosted by Development and Product Management. All of these suggestions are discussed and considered for future releases. Although I could copy your post and paste it into the web form, there are a couple of questions on the form that only you can answer.