Robert,
Thanks for the link! However, I was hoping to be able to add the item through a Setup program, instead of having to manually set it up. Also, I would like to use the filename as a parameter into the application, and that doesn't seem to illustrate how.

>Hi Mike,
>
>Maybe this link will help you getting started:
>
>http://www.theeldergeek.com/file_list_generator.htm
>
>
>>I'm sure this is possible, but I'm not sure where to start.
>>
>>We have a system that exports a space-delimited file. I need to make that a comma-delimited file. What I want to do is allow the user to right click on the file, and then select a "Convert to CSV" from the context menu, and have that kick off an application that will convert it, similar to how WinZip has an "Add To test.zip" option.
>>
>>Where do I start?