Thank you for your post.
The standard carriage return is ASCII-13. FileMaker internally stores carriage returns in Text fields as ASCII-11. One reason for this substitution is when exporting to text fields, as records in text fields (tab-delimited, comma-delimited) are separated by carriage returns, and if you had several returns in a field, that would equate to several records for the one record.
Specifically, the text manipulation forum
These links do not answer your question, but may prove useful
At the bottom of this page there is a Filemaker Applescript Reference
FileMaker Automator Action Pack for Leopard