Business Entities in the DAL

Hi,

 I'm after a bit of advice here.

I have a business entity (call it say BusinessEntity) that i used in several forms in my web app.

I have a page (page A) that displays say an ID, a name and a reference

I have a page (page B) that, when clicking on an ID displays the same data as above in addition to another 10 fields (say address info)

My question is, how do i define and implement the business entity here?

I'm using data readers, and dont want to pull back more columns than needed. So do I define 2 seperate business entities, one containing ID, name and referece and one containing all the details needed for page b or do i define 1 business entity and retrieve columns i dont need for page a?

I dont really want to create more entities than i need, and any help would be gratefully received.
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