Using the Data Assist Wizard to to an update eliminates the layout of the custom form.
If you use the Data Assist wizard and have it create a Results page and an update page, it will be configured for you. 
Problem is that the form was laid out carefully as a custom form, and I was under the impression that I would be able to make this custom layout work for update too, but apparently I was wrong. Using the custom form interface is very manual and labor intensive, and manually binding everything is even worse. I would have thought that the tool should be equally adept at building an update as an insert since there are very similar. I'm quite disappointed by the slow frustrating interface. If I wanted plain vanilla I would use a rad tool on a Microsoft stack and be done in 1/10 of the time. I thought that these tools would let me maintain a greater degree of design control. I would like to strongly suggest that you add an option that would basically clone an update form from an insert form, or better yet let a user select either insert or update for any custom form. All the fields have to be mapped for the insert, so using that information to map to an update should not be overly difficult it seems. (I realize it isn't a tiny job, but it would improve the usability of the tool an order of magnitude!)
