The short answer is no. The long answer is that you can only log into a single icd extension on a phone at any one time. In order to accomplish this you would need to use Attendant Console for your operators as opposed to IPCC Express.
Yeah, unfortunately not. That would actually cause numerous problems as JTAPI (jtapi 2.x has fixed some of the issues but not on CRS) doesn't support having a the same directory appear twice regardless of the partition they are in.