[otrs] Problem with password (salt generation)

Hi! I have a problem with OTRS password system. I need to create passwords manually without using perl. I know that passwords (table customer_user - "pw") are created with crypt function: storedPW = crypt(password,salt). I don't know how to obtain salt. I found some hints that salt is related to username, but customer_user doesn't have username. None of the data seems to match generated salt. (I can see two first letters when i generate password in OTRS) Maybe someone knows the algorithm to generate salt? I would be eternally grateful... Impera