Hi Suzy,

Since Archetype is too flexible (almost a document type of itself) this is only possible with the recordsimporting/recordimported event. This gives you a list of all the properties that you can set. Then you need to convert that to something ArcheType accepts and you can store it on the document property.

Below a sample. To get this to work you need a reference to Umbraco.Core, CMSImport.Extensions and CMSImport.Library dll's

using CMSImportLibrary.Providers.ImportProviders.Content;
using Umbraco.Core;
using Umbraco.Core.Models;

namespace EventSample
{
public class EventTester :ApplicationEventHandler
{
    protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
    {
        ContentImportProvider.RecordImporting += ContentImportProvider_RecordImporting;
    }

    void ContentImportProvider_RecordImporting(object sender, CMSImport.Extensions.Providers.ImportProviders.EventArgs.RecordImportingEventArgs e)
    {
        var doc = sender as IContent;
        var prop1 = e.Items["key1"];
        var prop2 = e.Items["key2"];
        var prop3 = e.Items["key3"];

        //Do something with ArcheType
        doc.SetValue("ArcheType", your archetypevalue here);

    }
}

}

I hope this helps you,

Richard