Shure, that can be done with a simple Set-Fields.
You can add it to the beginning or the end, or if you can determin a position, you can insert it there as well.
Here is to add a CR (NL or CR/NL) at the end:
If you get a CR+NL but only want the CR, you can remove the second character with this:
If you want to insert the CR in the middle somewhere, you must determin the position where you want to insert it. This exaple replaces a string-tag with a CR:
Best Regards - Misi, RRR AB, http://rrr.se