IDT Authentication

Hi Experts

I have a scenario where I have to give certain users access to the IDT tool on a DEV server. (BO 4.1 SP4 )

My questions are :

1. Is there a client tool that can be installed on the local machines for IDT access?
2. If not, then user accounts will have to be created for Remote Desktop to the server?
3. Then also, BO user accounts belonging to the Universe Designer Group in the CMC?
4. I have seen that if you are logged onto the server via RD with Administrator credentials, and you open IDT, it logs you in automatically. Is there a way to configure IDT to ask for credentials every time it is opened?

Regards

Lukas