It sounds like you are not familiar with ISO 9000 at all :-)
This standard is about following your internal rules, it is not
a set of rules itself, so if you have a rule which prohibits SED
scripts in your environment, this is a rule you have created
for yourself, and you cannot blame ISO 9000! One of the risks
in ISO 9000 environments is being stuck with silly rules. You
can get certification pretty much regardless of whether your
rules make sense, just as long as you can show you follow them
rigorously :-)