Bulk user creation

It is done (kinda') in populate.php -would it be possibble to insert a bulk of users?

Hi again,

for i website i have to build a community of members already exsist (i've got all names and email addresses).
I am looking into a way to make these +/- 100 people members/editors, without doing them one by one, ofcourse.

I saw something simular in populate.php.

Could someone give some pointers on how to do this, or is this even a faeture more people would like to see?