That will pretty much be your script then, add the command to save at the end. It should look like this.
config t
access-list 97 permit 10.21.26.192
access-list 97 permit 10.21.26.195
access-list 97 permit 10.21.26.196
access-list 97 permit 10.21.26.197
end
copy run start
!
The blank lines after the copy run start are there to get past the hitting enter to confirm the save, and the exclamation mark (comment) line is there to ensure that the blank lines don't get stripped.
That should be all there is to it.