[vchkpw] Encryption differences between 4.9.6 and 5.4.2

Hello! I would gladly appreciate if anyone could tell me te differences between the encryption-methods between vpopmail 4.9.6 and 5.4.2. I have recently done and upgrade and when I'm converting the usertable I don't have the clear-text password and since the encryption-methods differ I need to

[vchkpw] Upgrade from 4.9.7(mysql auth) to 5.4.2(mysql auth)

Hi, I'm terrible sorry for asking this question, but I cannot find any documentation on how to convert from 4.9.7 mysql auth. to 5.4.2 auth. If there's documentation please do post it to me.I have donethe neccessaryinstallation, but I figure that I have to do some changes in the vpopmail-db