a!pickerFieldRecords - is there a way to control which record fields it searches on, and what is displayed in the suggestions/selected options?

Hi there, i want to use the a!pickerFieldRecords interface component but I want to control which record fields the user is querying against when typing into this, and I also want the suggestions/selected value to displayed using a custom record field I created which is a concatenation of the two fields I want the user to be able to query against. Is there a way I can do this?