Does this dvr come with a hand held infra red remote control?
No, this unit does not come with an IR remote control.
What power supply do we need to run this IPTZ-P400 ?
A 12v 1 amp PSU will be required for this camera.
What is the difference between this and the V2 model?
The V2 version of this camera has better flylead to facilitate transmission over cat5 as well as it's native RG59 coax.
How do you connect an IP camera to this DVR?
Firstly you will need to login to the unit , go to System -> Digital -> Channel type, then select the configuaration that supporst IP. An IP camera is then connected to this unit via it's RJ45 (lan port) using a network switch or POE switch.