how to batch edit the content of script files

[cyberish]

I need to add the same new lines to existing apple scripts at the beginning and the end of it. - How can this be done instead of editing each one by hand...

 

[Slartibart]

with a script! in the simplest form something like:

cat oldscript newend > newscript

or

cat newsreader oldscript > newscript

via terminal.