Is there a way to make a batch file? So, he can drag a txt file onto the batch and it types the required !points add command? and it uses his username/permissions?
You wouldn't use a batch file, this is why mirc has a scripting language. Isn't he the one running the bot? Why wouldn't he have access to the add points command? Nillen already gave a script to loop over the names in the file, just use the /msg command to message the channel. With 600 lines this'll have to be spread out with a timer to avoid being kicked off the server.