import users whose passwords are hashed with crypt()

Hi

I have a userbase of around 8000 people which I would like to import into gallery2.
Unfortunately, the password file is in unix crypt style which is not md5.

My current idea is to make the 8000 createUser calls and give the crypt string as hashedpassword and pretend it's md5. Then modify the code in modules/core/classes/GalleryUser.class (I guess in isCorrectPassword) so that it also is able to verify crypt type passwords.
Maybe even (if the crypt check is ok) add an automatic call to changePassword to change from crypt to md5.

Opinions?

Georges