Gilbert,
I've played with a bit and made some progress, but not success yet. Here's what I found:
The \n text inside your string must be converted to a chr(13) and then the string must be split into an array so the values may be written into different cells. See if you can use this line of code and work from there to get the resulting data into your cells:
txt1 = txt1.split(/\\n/g);
This uses the REGEX matching string to find every occurance (globally) of the string sequence "\" followed by "n". When that match is found, the string is "split" into different array entries. In my results, I get an array like this:
[Marie, , Jean, , Paul]
From there you should be able to manipulate your code to put the results back into cell D5 (presumably D5, D6, D7, in this case).
I hope this helps.
Mike