Heres the code that I developed.  Hopefully this may help others in the future. The code selects a pricebook based on the Opportunity Record Type.  Then all of the products (total of 18) on the pricebook are added to the Opportunity.  Our sales reps now only have to update quantities and prices for some of the products.  This is a huge time savings. 

trigger Technology_iKnowMedProducts on Opportunity (before insert, after insert) {
  //Make iKnowMed Pricebook the default when Opportunity Record Type is iKnowMed
    Pricebook2 ikmBook = [SELECT Id FROM Pricebook2 WHERE Id = '01sJ00000001AG1'];
    if(Trigger.isBefore) {
        for(Opportunity oppty: Trigger.new) {
            if(oppty.RecordTypeId=='012J00000004wnY'){
            oppty.Pricebook2Id = ikmBook.Id;
        }
        }
    }
    if(Trigger.isAfter) {
    //Add all of the products on the iKnowMed Pricebook
        
      List<OpportunityLineItem> opptyline = new List<OpportunityLineItem>();
        
        for(Opportunity record: Trigger.new) {
            if(record.RecordTypeId=='012J00000004wnY'){     
             
                for(PricebookEntry entry: [SELECT Id, UnitPrice FROM PricebookEntry WHERE Pricebook2Id = :ikmBook.Id]){
                
        OpportunityLineItem lines = new OpportunityLineItem();
                lines.PricebookEntryId=entry.Id;
                lines.Quantity=1;
                lines.OpportunityId=record.Id;
                lines.UnitPrice=entry.UnitPrice;
            
                opptyline.add(lines);
        }
        insert opptyline;
    }
    }
    }     
}