[Paul M]

vb does a double conversion like this ;

Hash = MD5( MD5(password) . SALT )

Since you have the MD5(password) already, to convert your hashes to vb format you just need to do MD5 ( HASH . SALT ) - where HASH is your current MD5 hash and SALT is the users salt (stored in the user table). Obviously for a new import, you could create the salt yourself, and then store it in the user table at the same time as everything else.