Importing Users from Vanilla into Wordpress 2.7

Hi, I am trying to import users from an existing install of Vanilla into and existing install of Wordpress 2.7. I have manually imported all 1000+ users and everything looks in order except for the user_pass field in the wp_users table uses a different sort of encryption so the existing vanilla user's passwords do not work when logging into wordpress. The exisitng Wordpress users have user_pass fields that all look kinda like this: $P$5FxI4fyui3vAxqRjGFJfzEe6dPT8Pu1 While the user_pass field for users imported from Vanilla all look kinda like this: 0x245024396939512e44366d6363324a546c6d6f73384f2e4441343841733248425231 Is there some way to convert the encryption of the Vanilla user's passwords to match what Wordpress 2.7 uses? Or is there a way in wordpress to just reset the passwords for all of the users and email them to the users? Any help would be much appreciated!