So if i bought this:
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=92475
(vacuum pump)

and these:
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=2435
(R134 gauges)

I could do this myself. I am not confident with the general procedure, what are the steps to evacuate and then recharge. Reading the manual for the vacuum pump it tells you to attach the vacuum line to the vacuum port on the A/C system. Where is this located?