Auto Air Conditioning & Heater Repair: 99 civic ac compressor replacement, replacement compressor, vacuum pump

Question
I would like to know how to go about replacing the compressor on a 99 civic.  I have a replacement compressor and receiver/drier.  I would like to know if it is required to flush the system. What type and how much oil and r134a should be put back into the system. My old compressor has seized up and on the low side of the system while the car was off read a high pressure of about 120 psi.  What else is there to look for during the repair?
Thanks in advance.
Jay

Answer
Your going to need:

a set of AC gages

A vacuum pump.

A leak detector.
The specifics of how much oil to add as well as how much freon.

A flushing statio.

replace the orifice tube.

Without this equipment a quality repair cannot be done.