Bulk user account import on Win2K Server

I am using the CSVDE tool on Windows 2000 server to import around 700 user accounts into active directory. This works fine, but I can’t import pre-assigned passwords using this method. To import the passwords I am trying to use a batch file with the net user command. This assigns the passwords to the user accounts, but here’s my problem – In the account options for each of the newly created accounts both “User must change password at next logon” and “User cannot change password” are checked. This of course won’t work. I would like only “User cannot change password” checked. Is there a command that would resolve this or a way to do a mass change for these account options?