QUESTION ABOUT CUTOMER

Hello My friends. I am using MSP6004 of the OPManger. In the begging(before network discovery), I had created three customer accounts. Although, I register all the probes under one customer and I have discovered the network under the same customer. Now I want to move some servers under the other two customers and keep the rest. I searched for a way to do this but I couldn't. Please If you know how,let me know in details how I can do it. Also, Is there any feature in this version to create a user and assigned him the view of some servers ONLY? How?

Thanks and Looking forward to hear from you all.