Import contcats, accounts and address using csv

Hi,

We have an existing scripting solution that imports the contact  (it includes accounts and addresses as well) records from csv file. Recently one of the user tried to import European contacts which has accented characters in it and it truncated all the characters after the first occurrence of an accented character. In script, current fopen mode is 'rt' and i tried changing it to 'ru' mode, when i change it ru mode it is reading all the characters as ????. I tried this in my local system. My local OS is Windows XP. Do we need to do anything special