That's fine for a small number of adds, but not suitable for a larger group. It's also relatively fragile as one typo will kill the whole add. There are two options:
- Use some central repository, such as a file on google drive, to hold a configuration file. Read it on loading and run the adds from it.
- Write a program to write the program. It reads a configuration file and its output can be simply included by hand, or from a central location. (i.e. a web reference).