How to include preset in RTF import option while importing RTF files?

Question

Dear all,
I created a script which will place text from rtf files present in a folder to an active document on different page based on match. I am using a preset name "myRTF" which i will use when i import rtf files without script.
Is there a way to include this preset in script?
I have checked many places....... but did not found.
#target Indesign
var myDoc = app.documents.item(0);
var sourceFolder = Folder("/Users/admin4/Desktop/ec_txt");
myFiles = sourceFolder.getFiles("*.rtf");
var myFrame1 = myDoc.pageItems.itemByID(111076);  // switerland
var myFrame2 = myDoc.pageItems.itemByID(111114);  // eurozone
var myFrame3 = myDoc.pageItems.itemByID(111146);  // germany
for (var i=0; i < myFiles.length; i++)
    switch (myFiles[i].name.slice (6, myFiles[i].name.lastIndexOf("_")))
        case "Switzerland_en":
        myFrame1.parentStory.insertionPoints.item(-1).place(File (sourceFolder + "/" + myFiles[i].name))
        break;
        case "Eurozone_en":
        myFrame2.parentStory.insertionPoints.item(-1).place(File (sourceFolder + "/" + myFiles[i].name))
        break;
        case "Germany_en":
        myFrame3.parentStory.insertionPoints.item(-1).place(File (sourceFolder + "/" + myFiles[i].name))
        break;

Answer 1

Hi Dave, Peter,
thanks for your reply. In that case i will check WordRTFImportPreference but not sure if customize style import can be done for paragraph style sheets.
for example: word has "normal" and "head1" style but i want to map to indesign Body_light and H1 styles respectively.
Virender