Ballast Wiring Help

[Shy_Koi]

I bought a 175 W Hamilton MH ballast/socket/spider reflector from eBay, sans cord
The wiring diagram appears straight forward enough - except that the mogul socket's wires are white & black and the instructions say that the red & blue ballast wires go to the lamp...? (pics below)
The black & white ballast wires go the power cord (I want to have a quick disconnect) what type/rating of wire does it require?
Lastly, there is a 5th wire (green) - I'm assuming this is the ground. Does this get wired in with the AC? What about the reflector? Does it need to be grounded, and if so, where from/to?
Although I do most of the DIY stuff around here, I havn't fooled around with something like this before - should I just hand it over to an expert?
Thanks in advance for any help!
~Tamara