Hi Spotswood,
We don't recommend using Access for InfoPath data collection because there is no way to lock data nor handle network license issues...
We recommend you use SQL Express (free) and our Database Accelerator Web Service (DBXL, also free trial).
We can help you set this up, but there is a fundamental difference between Access-backed tightly coupled forms, and SQL-backed, loosely coupled DBXL forms.
You may need to recreate your form, but it should not take a lot of time.
Installing DBXL and sending out a link to people to fill out should not take much time either.
Email me if you have any issues.
Best,