addField of type select for transaction type and status

I have a saved search that I add addition filters to in beforeLoad and then want to show as a subList.  The search included the fields type and status from the transaction.  I want to show the user frienld name not the internalId of these fields.  The fields are select fields but what is the source?

 var licenseID = nlapiGetFieldValue('name');    nlapiLogExecution('DEBUG', 'licenseID', licenseID);    var filterSearch = new Array();    filterSearch[0] = new nlobjSearchFilter('custcol_gem_license_num', null,'is', licenseID);    var mcItemsData = nlapiSearchRecord('transaction','customsearch_gem_license_mc_items',filterSearch);    nlapiLogExecution('DEBUG', 'mcItemsData', mcItemsData);    var orderMCItems = form.addSubList('custpage_ordermcitems', 'staticlist', 'Maintenace Items', 'custom80');        orderMCItems.addField('type', 'text', 'Type');     //orderMCItems.addField('type','select','Type', 'type');               orderMCItems.addField('statusref','text','Status');    //orderMCItems.addField('statusref','select','Status','transtatus');