Im looking to build a new feed from my site which is a tab delimited txt file which i can update on a daily basis

Any one know oh a tutorial to how to do this??

I have easy populate installed and the froogle.txt file is close to waht i need but now correct... is there a way of adding another button to easy populate for a new feed... ie custom feed.txt that will create / update a txt file of my choice, still keeping the froogle feed though