I am using InfoPath to create a custom form on the SP2010 list. When the "created by" field is dropped on the design surface it uses a picker control. How do you go about using a Textbox control to display the user name. I don't see an options for this. Thanks
You would add a calculated value to accomplish this.
Do not add your Created By field to the form template.
That should do it (just tested). Note that it wont show on new forms for obvious reasons.