How to add 100 fake users to database?

[Markets Where]

I have tried to use
insert forum_user (username,password) value ('user 1','userpasswordhere');
...
...
...
insert forum_user (username,password) value ('user 100','userpasswordhere');

all same password, buy when I use the use name to login, I can not.

please help me how to add more users to mysql database one time.

thanks.

[Dismounted]

Use vBulletin Data Managers.