I have made the script and it plugs into WHM easily creates the ease of creating Multiple accounts, where it rotates the username around, assigns them all the same password and hit create and you have all the new accounts you ever need on the server

.
You will need to create a frames file, multicreate file and make a new command file to place in the appropriate skin of WHM you are using. However mine isn't for sale or free, I just figured I can give you a heads up on what needs to be done.
Good Luck!