This is an update to my earlier post on SharePoint Designer 2007 Workflow on Task Lists
TBone has a nice article about changing the auto-assigned workflow task. The article can be found here:
http://www.sharepointblogs.com/tbone/archive/2008/01/10/ode-to-joy-changing-the-task-list-for-auto-generated-tasks-within-sharepoint-designer.aspx
Thanks TBone!