SharePoint表单库：以编程方式或Stsadm命令将内容类型更改为自定义表单模板

I have a custom site definition which includes a form library. I have a form template created in InfoPath. Through SharePoint features I can deploy everything except I cannot figure out how to change the default form for the form library to point to the form I created in InfoPath. I have a feature which deploys the form just great but I have to manually go into advanced settings on the form library, allow content type management, change the default content type to the template, and remove the default content type.I have a custom site definition which includes