Dynamic Tool Configuration

Newbie here wanting to get information, links, opinions on how to configure a simple data flow from code. Here's my example. I have a CSV input tool, a SORT tool, and a CSV output tool. I want to call this package from an application running C#. Can I access this package like DataPack("filename","sort","output filename") from the object model? Or does XML have to get involved? Can I dynamically swap out the input or output tools? Any links to the UML mockup of the object model? Just getting started here.

Thanks in advance,
Mitch

Start here: ms-help://MS.SQLCC.v9/MS.SQLSVR.v9.en/extran9/html/60fe148b-a7c4-4289-ae3e-2e949fc1886c.htm