Also, take the time to learn about how to do things using SSIS before jumping in. Also, learn how to do internet searches. I did a quick search and the 2nd link in the results was probably one of the best explanation of how to check if file exists.
Many of us here are quite willing to help others. Some of us will not rush to help those that show no sign of having tried to help themselves.
For best practices on asking questions, please read the following article: Forum Etiquette: How to post data/code on a forum to get the best help[/url]