Hi _Tmc_,
Not quite sure what you mean, but I'll reply anyway ...
When you admin deploy a form in MOSS 2007 (or use the sandbox in SharePoint 2010) the form is published to a folder on SharePoint. You can create a form library from the SharePoint UI (not from InfoPath) and either a) set it to use content types (and associate your form template that way), or b) change the form template directly on the form library to point to the published admin form. So, you can get that to work and it's pretty easy. Check out Jo-Anne's blog for details on how to add form templates published as content types to form libraries ...
Regarding your columns, you do not need to set these from the publish dialogs. You can set the columns using the File->Advanced Options->PropertyPromotion dialog (or Tools->Form Options->Property PRomotion in IP2007).
Best of luck!