InfoPath Dev

I thought about that, but the problem is that I have the parent field with a number of options and depending on which one the user picks there are several sub-options he/she can choose from.  Tiered drop down boxes is what I need to be able to create and since you can't have an ID number be both repeating and the primary key inside an ...

I have an excel file of data that I want to link to my infopath form. But I want to be able to launch my form and then through a piece of key data (eg. An ID number) prefill a section of the form. Is this possible? If so, how do I go about this?

I am creating a form I will put on share point. My challenge is that the form needs to be processed not just internally but externally as well. My company's firewall doesn't allow the access to our sharepoint site. So I want to know how I can easily import the data I will collect from my external users into a form.