Hi:
So, if you aren't going to write custom code, if you want to submit to Access, you have to base your form off the database you intend to submit to. However, you can add additional 'ordinary' fields to the resulting data source (for information that you just want stored in the form). You can only add new fields to the very root of the data source, so in the Main Data Source (after having created your form by basing it off your Access DB) you can right click at the very top folder and then start adding other fields.
Hope that helps!