1. Sorry for the delayed response! :)

2. Here's the answer to your question: You can match a custom page attribute to the value of a particular field in order to select with Data Display record to show. Say you have a page attribute called "last_name" with the value "garcia". In the DD Detail block, you can specify "last_name" as the custom attribute to match to, and then tell it to match to a field called "Last Name" (or whatever field you want) in your form. The block would then pull the first record it finds that has "garcia" specified for the "Last Name" field.