In reply to Roberto Meléndez.

The templates are the better solution if you wish to have your changes retained if the generate_boot_scripts.sh is run. The template directory contains many different templates for many different needs, but to accomplish what you have suggested above on a Linux OS system installed with the EN language, the four files that require edits are
messages_en.txt
sas.servers.mainlog
sas.servers.mid.template
sas.servers.pre.template
The sas.servers.mainlong is the place you would want to edit the logmsg() function to retain the echo -e across script regeneration. Also, don't forget to put the color definition in each of the templates otherwise the generated scripts won't know about the color variables.