Generate text file from data table

[Peanuts890]

Anyone with experience generating (or replacing) a text file from data held in a table. I have a table made up of 4 columns and variable number of rows. Column A has 8-digit number; B has 8-digit number; C has text up to 40 chars; D has a number with two decimal points. I would like to generate or replace a text file in csv format containing each row's data EXCEPT where column D value (number with 2-decimal points) is 0.00.
Using Excel 2003.

Thanks for taking time to read this - IanS